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Sample Data A researcher with the Department of Education followed a cohort of students who graduated from high school in a certain year, menitoring the progress the students made toward completing a bacheior's degree. One aspect of his research was to determine whether students who first attended community college took langer to attain a bachelors dogree than those who inmediately atended and remained at a 4-year institution. The data in the table attached below summarize the results of his study, Cemplete parts a) through e) below. Click the icon to view the sample data. a) What is the response variable in this study? What is the explanatory variable? A. The response variable is the use of community college of not. The explanatory varable is the ime to graduale. B. The response variable is the time to graduate. The explanatory variable is the use of comminity coliege or not. C. The cesponse variable is the time to graduale. The explanatory variable is the number of students: D. The response variable is the number of students. The explanatory variable is the time to graduate. b) Explain why this stuaty can be analyzed using inference of two sample means. Delerrine what quabtcations are met to pertorm the hypotsesis test about the difterence betaeon two mears. Solect al that apply. A. The samples can be reasonably ascumed to be random B. The pepulation is given to be normally distributed. c. The sample sizes ase not more than 5% of the population. D. The sampie sizes are iarge (both greaier than of equal 730 ) t. The samples are independent and aliemative hypothestib. c) Does the evidence suggest that community college transfer students take longer to attain a bachelor's degree? Use an = 0.10 level of significance. Perform a hypothesis test. Delermine th and aliemative hypotheses. Delermine the test statiatic: I = (Round to twe decimal places as needed.) Deteatinine the Pivalue. P.value = (Round to three decimal places as needed.) Should the hypothesis be rejected? the nul hypottiesis. The ividence suggest that community colloge fransfor students take longer to attain a bacheiors dogree at the a = 0 , 10 levei of aignicicance. d) Construct a 95% confidence interval for Heometunity colege - Hno transer to approximate the mean addilonal time it takes to complete a bicheloris degree if you begin in community celege. The confidence interval is the range from to (Round to three decimal places as needed.) e) Do the results of parts c) and d) imply that community oolege causes you to take extra time to eam a bachelor's degree?.

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Cumulative Final Exam Your response has been submitted successfully. Points Awarded 95 Points Missed 5 Percentage 95% 1. A description of different houses for sale includes the following variables. Which of the variables is categorical? A. the square footage of the house B. whether or not the house has a finished basement C. the monthly electric bill D. All of the above Correct Points Earned: 1/1 Correct Answer: B Your Response: B 2. As part of a data base on new births at a hospital, some variables recorded are the age of the mother, marital status of the mother (e.g., single, married, divorced), weight of the baby, and sex of the baby. Of these variables A. the individuals described are mothers and babies involved in births at a hospital. B. age of mother and weight of baby are quantitative variables. C. sex and marital status are categorical variables. D. All of the above. Correct Points Earned: 1/1 Correct Answer: D Your Response: D 3. A large university is divided into six colleges, with most students graduating from four of these colleges. The following bar chart gives the distribution of the percent graduating from the four most popular colleges in 2003. Reference: Ref 1-2 Which of the following is a correct statement? A. A timeplot of the 2003 distribution would be more informative. B. The bar graph is skewed to the right. C. The bar graph is skewed to the left. D. It would be correct to make a pie chart if you added an “Other” category. Correct Points Earned: 1/1 Correct Answer: D Your Response: D 4. The histogram below shows the time visitors to a museum spent browsing an exhibit on a Saturday. There were 300 visitors that day. The following histogram is of the data collected. Reference: Ref 1-3 The histogram A. is skewed right. B. has an outlier. C. is asymmetric. D. All of the above Correct Points Earned: 1/1 Correct Answer: D Your Response: D 5. The stemplot below displays midterm exam scores for the 34 students taking a Calculus course. The highest possible test score was 100. The teacher declared that an exam grade of 65 or higher was good enough for a grade of “C” or better. Reference: Ref 1-5 The percent of students earning a grade of “C” or higher (as declared by the teacher) is closest to A. 35%. B. 50%. C. 65%. D. 80%. Correct Points Earned: 1/1 Correct Answer: C Your Response: C 6. A stemplot of ages of 18 faculty members in a college math department follows. 4|3 represents 43 years. Reference: Ref 2-2 The median age (in years) of the faculty members at Wilmington State is A. 39. B. 45. C. 47.5. D. 49. Correct Points Earned: 1/1 Correct Answer: C Your Response: C 7. The exam scores (out of 100 points) for all students taking an introductory Statistics course are used to construct the following boxplot. Reference: Ref 2-3 If each person increased his or her score by 5 points then A. the third quartile would increase by 5 points. B. the median score would increase by 5 points. C. the i.

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1) Those methods involving the collection, presentation, and characterization of a set of data in order to properly describe the various features of that set of data are called A) statistical inference. B) the scientific method. C) sampling. D) descriptive statistics. Answer: D 2) Which of the following is NOT an element of descriptive statistical problems? A) an inference made about the population based on the sample B) the population or sample of interest C) tables, graphs, or numerical summary tools D) identification of patterns in the data Answer: A 3) Most analysts focus on the cost of tuition as the way to measure the cost of a college education. But incidentals, such as textbook costs, are rarely considered. A researcher at Drummand University wanted to estimate the textbook costs of first-year students at Drummand. To do so, she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $600 per semester. Identify the population of interest to the researcher. A) all Drummand University students B) all college students C) all first-year Drummand University students D) the 250 students that were monitored Answer: C 4) Researchers are concerned that the weight of the average American school child is increasing, implying, among other things, that children's clothing should be manufactured and marketed in larger sizes. If X is the weight of school children sampled in a nationwide study, then X is an example of A) a categorical random variable. B) a discrete random variable. C) a continuous random variable. D) a parameter. Answer: C 5) The chancellor of a major university was concerned about alcohol abuse on her campus and wanted to find out the proportion of students at her university who visited campus bars on the weekend before the final exam week. Her assistant took a random sample of 250 students. The answer on "whether you visited campus bars on the weekend before the final exam week" from students in the sample is an example of A) a categorical random variable. B) a discrete random variable. C) a continuous random variable. D) a parameter. Answer: A 6) The British Airways Internet site provides a questionnaire instrument that can be answered electronically. Which of the four methods of data collection is involved when people complete the questionnaire? A) published sources B) experimentation C) surveying D) observation Answer: C 7) A professor of economics at a small Texas university wanted to determine what year in school students were taking his tough economics course. Shown below is a pie chart of the results. What percentage of the class took the course prior to reaching their senior year? A) 14% B) 44% C) 54% D) 86% Answer: D 8) One of the developing countries is experiencing a baby boom, with the number of births rising for the fifth year in a row, according to a BBC News report. Which of the following is best for displaying this data? A) a Pareto chart B) a two-way cl ...

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1. What is the independent variable? 2. What is the dependent variable? 3. Which one of the research designs below enables use to determine cause and effect? A. correlational B. descriptive C. experimental D. A & C 4. The "scientific method" refers to A. historical, social-cultural, and ethical contexts in which science takes place. B. the specific procedures, measurements, and instruments used by psychologists to conduct research. C. an abstract concept that describes the logic and methods used to answer questions. D. the development of psychophysical methods for measuring thought processes. 5. In a study that investigates the effects of two different doses of a drug on memory performance, memory performance represents the ____ variable and doses of the drug represent the ____variable. A. correlational; confounding B. experimental; control C. dependent; independent D. independent; dependent 6. When the three requirements for causal inference are met, an experiment is said to be A. balanced. B. internally valid. C. an independent groups design. D. held constant. 7. The extent to which findings from a study can be used to describe different populations, settings, and conditions is referred to as A. sampling. B. internal validity. C. external validity. D. the multimethod approach. 8. The statement of a research hypothesis includes A. an explanation for why a particular behavior is under investigation. B. a predicted outcome and an explanation for the outcome. C. an overview of previous research findings regarding the topic. D. all of these 9. You are investigating how sleep affects memory. You assign half of your participants to sleep for 8 hours and half to sleep for 4 hours. You then have participants complete a questionnaire asking them to recall how many times their parents brought them to the zoo as a child. Which of the following statements is NOT true concerning this experiment? A. The independent variable is recall. B. The dependent variable is recall. C. The independent variable is amount of sleep. D. Sleep is expected to affect memory. 10. What does an Institutional Review Board (IRB) do? A. Makes sure a proposed study is ethical B. Makes sure a study was conducted according to the plan C. Makes sure a study will employ a method that produces quality data D. A & C 11. A researcher computes an inferential statistic to test the difference between mean scores for an experimental group and a control group. The probability of the obtained statistical value for the t-test is .025, which is less than the alpha level of significance (p < .05). The researcher should A. reduce the alpha level of significance to .025 to form a definite conclusion. B. accept the null hypothesis of no difference between the experimental and control groups because the probability is so small; thus, the independent variable had no effect. C. reject the null hypothesis of no difference between the experimental and control.

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Page 2 of 5 MG 620 Term Project and Grading Rubrics SPRING 2019 Grading Rubrics: >Detailed > Stage I………………………………………………..…………………………… (30%) A. Select a topic of interest: Identify the variable under study a. Topic: 1. Once you have identified your topic, define your variable of interest which will be your topic for undertaking the research. For example, if your topic is the Transportation industry, then you will focus on the profit for that industry, try to identify some factors that will help explain the industry’s profit such as costs of shipment, cost of production, market shares or revenues. Next, try to formulate your title by turning the relationship between profit and one of the explanatory factor in the form of a question that will motive to collect data to solve the problem. Title: Do revenues and costs influence the profit of the transportation industry for the most recent twenty years? 2. If you are interested in examining the problems facing First Year College Students, then your topic is 1st Year Students. Title: Does the number of hours of study influence student Grade Point Average? The relationship between the dependent and independent variables can be known in advance before the data are collected. This pre-relationship is referred to as the theoretical framework. Reference at least three scholarly articles to understand how each independent variable influences the dependent variable. 1. Article number 1. For example, in the URL search for student performance. A list of articles will show up. Make a brief analysis (3-5 sentences) describing what the author reported about the relationship; positive, or negative. This will be part of your theoretical expectation of the variables before you collect the data. 2. Article 2. Do the same as above 3. Article 3. Do the same as above. If your topic is first year students, then you will need to identify theoretically all those factors that may explain the variations of the dependent variable. Some explanations are: Dependent Variable: GPA for the at least twenty-five students. Independent Variables: In theory, it is argued that as the number of hours studied, student gain more knowledge and confidence in the course material. So, the relationship between GPA and the number of hours studied is expected to be positive (make reference((s) to your articles). Do the same type of expectation for the average distance (in miles) travelled. B. Creating your data set before you start to write: Data collection. This data table will be eventually placed as an Appendix See below the data set in the table showing GPA and Hours Studied, distance travelled for 25 students. I: GPA: Grade point average over 25 students II. Variables that may influence GPA are Hours studied, and Distance travelled. Table showing the dependent variable (GPA) and independent variables (Hours and distance for twenty-five students. Student Dependent (Y) GPA Independent(X1) Hours Independent (X2) Distance Independen ...

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1. US Census statistics show that college graduates make more than $254,000 more intheir lifetime than non-college graduates. If you were to question the validity ofthis observation, what would be your basis for doing so? A. Definition of a college graduate B. Work lifestyles of the population C. Defining “lifetime” D. How the Census was taken 2. The average age in a sample of 190 students at City College is 22. As a result of this sample, it can be concluded that the average age of all the students at City College A. must be more than 22, since the population is always larger than the sample B. must be less than 22, since the sample is only a part of the population C. could not be 22 D. could be larger, smaller, or equal to 22 3. Since a sample is a subset of the population, the sample mean A. is always smaller than the mean of the population B. is always larger than the mean of the population C. must be equal to the mean of the population D. can be larger, smaller, or equal to the mean of the population Use the following situation for Questions 4-7. Michael, Inc., a manufacturer ofelectric defibrillators, is a firm that makes 50 types of electric defibrillators . Thetable below shows the price distribution of the defibrillators . Price (In $) Number of Defibrillators 100 – 130 8 140 - 170 12 180 - 210 20 220 - 250 10 TOTAL 761.22 Select from the following choices for Questions 4-7. Use letter only in the blank. A. 32 B. 50% C. 20 D. 30 E. 16% F. 10 G. 60% H. 50 4. How many defibrillators have a price of at least $180?__ D. _____ 5. What percentage of the defibrillators has a price of at least $180? ___%___ 6. What percentage of the defibrillators has a price of less than $140? ___ E. __ 7. How many defibrillators cost at least $140 but no more than $210? __ A. ____ 8. Temperature is an example ofa quantitative variable A. a qualitative variable B. a quantitative variable C. either a quantitative or qualitative variable D. neither a quantitative nor qualitative variable Use the following situation for Questions 9 and 10. The following frequency distribution shows the frequency of outbreaks of the11 virus (statistics flu) for the following households in a small rural community. Households 1134 406 168 41 25 12 : 1786 Outbreaks 0 1 2 3 4 5 9. Use the frequency distribution to construct a probability distribution by filling in the blanks below. x 0 1 2 3 4 5 P(x) P(0) = P(1) = P(2) = P(3) = P(4) = P(5) = 10. Compute the mean and the standard deviation and select from the following the appropriate interpretation of the results (select best response) A. A household on the average has 0.9 outbreaks with a standard deviation of.6 outbreaks B. A household on the average has 0.6 outbreaks with a standard deviation of12 outbreaks C. A household on the average has 0.9 outbreaks with a standard deviation of.9 outbreaks D. A household on the average has 0.6 outbreaks with a standard deviation of.9 outbreaks Use the following situ.

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1. A researcher is interested in whether students who attend private elementary schools do any better on s standard test of intelligence than the general population of elementary school children. A random sample of 75 students at a private elementary school is tested and has a mean intelligence test score of 103.5. The average for the general population of elementary school children is 100 (σ = 15). a) Is this a one- or a two- tailed tests? b) What are Ho and Ha for this study? c) Compute zobt d) What is zcv? e) Should Ho be rejected? What should the researcher conclude? f) Calculate the 95% confidence interval for the population mean, based on the sample mean. 2. Assume that the average person in America weights 150 pounds (μ). You want to determine whether colleges students weigh less than the average America, Following are the wights collected on a sample of colleges students: 120, 105, 166, 170, 145, 149, 135, 115, 168, 138. a) Is this a one- or two-tailed test? b) What are Ho and Ha for this study? c) Compute tobt d) What is tcv? e) Should Ho be rejected? What should the researcher conclude? 3. How does a t test differ from a z test in terms of when it is used, how it is calculated, and how we determine significance? 4. According to the U.S. Bureau of the Census, 75% of adults regularly drank alcohol in 1985. An investigator predicts that fewer adults drink now than drank then. A sample of 100 adults is asked about their current drinking habits; 67 report drinking, and 33 report not drinking. a) What is X2obt? b) What is (are) the df for this test? c) What is X2cv? d) What conclusion should be drawn from these results? 5. A health magazine recently reported a study in which researchers claimed that iron supplements increased memory and problem-solving abilities in a random sample of college women. All of the women took memory and problem-solving tests at the beginning of the study, then took iron supplements, and then took the same tests again at the end of the study. What is wrong with this design? What confounds could be leading to the results of improved memory and problem-solving skills? 6. In an experimental study of the effects of exercise on stress, participants are randomly assigned to either the no exercise or the exercise conditions. Identify what type of study this is—between-, within-, or matched-participants. In addition, identify the independent and dependent variables and the control and experimental groups. 7. What are the advantages and disadvantages in the use of a posttest-only control group design versus a pretest-posttest control group design? 8. What is a confound and how is it related to interval validity? 9. What is the relationship between external validity and the college sophomore problem? 10. Explain what counterbalancing is, how it is achieved, and which confound it helps to minimize. 11. Explain what a Latin square is and how it helps with counterbalanc ...

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1. In psychological research, investigators sample individuals' behavior at different times or in different situations. The goal of sampling behavior is to A. obtain as many observations as possible. B. infer causes of people's behavior. C. insure the highest possible interobserver reliability. D. obtain a representative sample of behavior. 2. When a researcher plays an active and significant role in the situation in which behavior is being recorded and when the researcher conceals the fact that observations are being made, the study represents A. a disguised structured observation. B. a disguised participant observation. C. an undisguised naturalistic observation. D. an unobtrusive field experiment 3. A high school teacher conducted a test of a new approach to teaching math. Students were given a pretest when their math class began and a posttest at the end of the semester. The students' math performance improved. The teacher learned near the end of the semester, however, that in their science classes the students were using new computer software that included much of the math the teacher covered in his course. Which of the following threats to internal validity does the new computer software represent? A. selection B. regression C. history D. testing 4. The remnants, fragments, and products of past behavior that provide unobtrusive measures of behavior are called A. subtle traces. B. archival records. C. physical traces. D. anecdotal evidence. 5. A researcher trains observers to complete checklists while observing children's behavior on the schoolyard during recess. Over the course of the study, observers become more reliable in their observations. Any effect of a treatment in this study might be confounded with an ____________ threat to internal validity. A. observation B. instrumentation C. additive D. expectancy effect 6. Time sampling is not an effective method for sampling behavior that occurs infrequently. To observe behaviors in situations that occur infrequently, researchers choose A. event sampling. B. defined sampling. C. random sampling. D. field sampling. 7. Students on two college campuses serve as treatment and control groups in a study investigating the effectiveness of an alcohol-abuse prevention campaign. A well-known student on one of the campuses dies of alcohol intoxication in the course of the study; students on the other campus did not learn of the student's death. The reaction of other students to the student's death on their campus could represent a potential threat to the internal validity of the study called A. history. B. selection. C. additive effects of selection and history. D. additive effects of selection and maturation. 8. Research studies have examined evidence of past human behavior including works of art, television shows, and bumper stickers, to test various hypotheses. This source of unobtrusive evidence is called A. human artifacts. B. use effects. C. cu ...

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Running head: RESEARCH CRITIQUE 1 RESEARCH CRITIQUE 6 Research Critique Student’s Name Institution Affiliation RESEARCH CRITIQUE Questions 1 - 4: Research Problem and Purpose. (For help with these questions, refer to chapters 2, 5, and 12) 1. Which choices below best reflect the problem statement for the instructor-assigned article? a. In an effort to address the shortages of nurses with undergraduate and graduate nursing degrees, nursing programs have been measuring student retention, attrition, and graduation rates. b. There is a paucity of research regarding the relationship of emotional intelligence, psychological empowerment, resilience, spiritual well-being, and academic success in the context of nursing students. c. The total score of the psychological empowerment scale represents psychological empowerment at that moment in time. This will not necessarily be the same when measured at a different point in time. d. Nurse educators need to examine ways to promote student success by improving our current methodologies and practices. 2. Which of the choices below best reflects the purpose statement for the instructor assigned article? a. Graduate prepared nurses will be needed to replace the large number of retiring faculty in Canada and the United States. In addition, nurse practitioners are needed to help alleviate the family physician shortage. b. The current rise in employment is improving forecasts for the future supply of registered nurses; however sizable shortages are still projected for the following decade in the United States. c. Many universities and admission departments dedicate substantial time and money for the recruitment and admission of nursing students. d. The purpose of the correlational study was to describe the relationship between emotional intelligence, psychological empowerment, resilience, spiritual well-being, and academic success and undergraduate and graduate nursing students. 3. According to Grove, Gray, and Burns (2015), which of the following statements are important when considering the significance and relevance of a study’s problem and purpose? (Select all that apply.) a. Does it consider ethical principles in its design? b. Does it predict the non-significant findings anticipated in the study? c. Does it influence nursing practice? d. Does it identify the population to whom they intend to generalize? e. Does it promote theory testing or development? f. Does it identify extraneous variables? 4. When considering the feasibility of a study’s problem and purpose, Grove, Gray, and Burns (2015) suggest that several areas should be evaluated, including: researcher expertise, money commitment, ethical considerations, and availability ...

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Title ABC/123 Version X 1 Student Textbook Resource Access PSYCH/625 Version 2 1 University of Phoenix Material PSYCH/625 Statistics for the Behavior Sciences Text Resources for Students Use the following links to access the data sets for the textbooks used in this course: Click here to access the Sage materials Statistics for People Who (Think They) Hate Statistics(5th ed.) (Salkind) Click here to access the Pearson materials Using SPSS for Windows and Macintosh. Analyzing and Understanding Data (6th ed.) (Green & Salkind) Copyright © XXXX by University of Phoenix. All rights reserved. Copyright © 2014 by University of Phoenix. All rights reserved. Title ABC/123 Version X 1 Time to Practice – Week Five PSYCH/625 Version 2 1 University of Phoenix Material Time to Practice – Week Five Complete Parts A, B, and C below. Part A Some questions in Part A require that you access data from Statistics for People Who (Think They) Hate Statistics. This data is available on the student website under the Student Text Resources link. 1. Use the following data to answer Questions 1a and 1b. Total no. of problems correct (out of a possible 20) Attitude toward test taking (out of a possible 100) 17 94 13 73 12 59 15 80 16 93 14 85 16 66 16 79 18 77 19 91 a. Compute the Pearson product-moment correlation coefficient by hand and show all your work. b. Construct a scatterplot for these 10 values by hand. Based on the scatterplot, would you predict the correlation to be direct or indirect? Why? 2. Rank the following correlation coefficients on strength of their relationship (list the weakest first): +.71 +.36 –.45 .47 –.62 3. Use IBM® SPSS® software to determine the correlation between hours of studying and grade point average for these honor students. Why is the correlation so low? Hours of studying GPA 23 3.95 12 3.90 15 4.00 14 3.76 16 3.97 21 3.89 14 3.66 11 3.91 18 3.80 9 3.89 4. Look at the following table. What type of correlation coefficient would you use to examine the relationship between sex (defined as male or female) and political affiliation? How about family configuration (two-parent or single-parent) and high school GPA? Explain why you selected the answers you did. Level of Measurement and Examples Variable X Variable Y Type of correlation Correlation being computed Nominal (voting preference, such as Republican or Democrat) Nominal (gender, such as male or female) Phi coefficient The correlation between voting preference and gender Nominal (social class, such as high, medium, or low) Ordinal (rank in high school graduating class) Rank biserial coefficient The correlation between social class and rank in high school Nominal (family configuration, such as intact or single parent) Interval (grade point average) Point biserial The correlation between family configuration and grade point average Ordinal (height converted to rank) Ordinal (weight converted to rank) Spearman rank correlation coefficient The correlation between hei ...

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Select all that are TRUE about the Basin and Range province? (select all that apply) a. playa lakes are common b. the geologic history of the basin and range is very simple c. there is currently a large high plateau in central Nevada d. parallel valley and mountain dominate the landscape e. The most recent deformation is related to subduction zone f. gardens are everywhere g. old structures are exposed in tilted fault blocks h. extension has geologically recently pulled the crust apart.

Select all that are TRUE about the Basin and Range province- (select.pdf

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Select all of the lines of evidence that early migrants traveled to No.pdf

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Select one multinational organization that gets a lot of media attenti.pdf

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Select all statements that are TRUE (check all that apply) Majority of TCP mechanisms today are network-assisted congestion control Packet loss can happen only because of network congestion Network congestion packet loss is drop of a packet when there is not enough space in transmission/reception buffer (queue) Increase of delay always indicates that there is potential congestion in the network Network-assisted congestion control is better /is (can be) more precise.

Select all statements that are TRUE (check all that apply) Majority of.pdf

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select all statements that correctly describe hemoglobin and myoglobin structure. Hemoglobin is a heterotetramer, whereas myoglobin is a monomer. By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron. Each hemoglobin or myoglobin molecule can bind four oxygen molecules. Molecular oxygen binds reversibly to the Fe(II)Fe(II) atom in heme. The heme prosthetic group is entirely buried within myoglobin. Each iron atom can form six coordination bonds. Two of these bonds are formed between iron and oxygen. Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron (Fe)(Fe) atom..

select all statements that correctly describe hemoglobin and myoglobin.pdf

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