A simple random sample with n56 provided a sample mean of 2.pdf

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A simple random sample with n=56 provided a sample mean of 29.5 and a sample standard deviation of 4.4 . (Round your answers to one decimal place.) (a) Develop a 90% confidence interval for the population mean. to (b) Develop a 95% confidence interval for the population mean. to (c) Develop a 99% confidence interval for the population mean. to.

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A study examined the relationship between using a foreign language and acting for the common good. They examined two groups of people, one that used their native language and one that used a foreign language. Each group was presented with a moral dilemma that required the subject to make a choice about helping a family member versus not helping family for the sake of several strangers. Those using a foreign language chose helping strangers at a higher rate than those using their native language. Complete parts a through c. a. Identify the response variable and the explanatory variable. What is the response variable? A. Whether a respondent used their native language or a foreign language B. Not helping family for the sake of several strangers C. The decision made by the respondents D. The foreign languages used What is the explanatory variable? A. The decision made by the respondents B. Not helping family for the sake of several strangers C. The foreign languages used D. Whether a respondent used their native language or a foreign language b. Is this study an observational study or an experiment? Explain. A. The study is an experiment because none of the variables are controlled by the researchers. B. The study is an experiment because at least one of the variables is controlled by the researchers. C. The study is an observational study because at least one of the variables is controlled by the researchers. D. The study is an observational study because none of the variables are controlled by the researchers. c. Can we conclude that speaking a foreign language causes one to act morally? Explain. A. Yes, because there is anecdotal evidence connecting the two variables. B. Yes, because the study found an association between the two variables. C. No, because the experiment does not account for lurking variables. D. No, because cause and effect cannot be concluded from observational studies..

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A student investigated the movement of substances through the cell surface membrane of yeast cells using an indicator. - The student was supplied with a suspension of yeast cells in a slightly alkaline solution. - The indicator used is yellow in alkaline conditions but turns red in acidic conditions. The student mixed the indicator with the yeast suspension and labelled the tube containing this suspension A. The suspension was red/pink in colour. (i) The student took a small sample from tube A and centrifuged this sample. After centrifuging, the student observed that the liquid portion was colourless but the cells at the bottom were red/ pink. Suggest the mechanism by which the indicator enters the cells and suggest the component of the membrane involved. mechanism component [2] (ii) The student took a small sample from suspension A and added alkaline ammonia solution. There was no colour change. What could the student conclude about the permeability of the yeast plasma membrane?.

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A social researcher claims that the average adult lisens to the radio more than 20 bours per week. He collects data on 35 individuals' radio listening habits and finds that the mean number of hours spent listening to the radio weekly is 21.4 houn and the sample standard deviation is four (4) bours. Can we conclude at the 10%6 significance level that he is right? We reject the nul hypothesis. We have sufficient evidence to support the alternative hypothesis: We don't reject the nul hypothesis. We don't have sufficient evidence to support the alternative hypothesis..

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A species that has a high rate of long-distance dispersal is more likely to colonize new habitat. But that species may also be less likely to adapt to local conditions because migration will be stronger than local selection pressures for many loci. Given those considerations, discuss when you expect that increasing dispersal might result in the evolution of a larger geographic range, and when it might not..

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A small country consists of five states (A, B, C, D, and E). The total population of the country is 42 million According to the country's constitution, the seats in the legislature are apportioned to the states according to their populations. The table below shows each state's standard quota, rounded to one. decimal place. Find the apportionment under Adams's method (Hint Look for suitable divisors in the interval 304,000 to 310,000 .) Determine the apportonment using Adams's method Complete the table below. (iype whone numbers.).

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A small liberal arts college would like to have an entering freshman class of 450 next year. Based on previous data, the college knows that the probability that a student who receives an acceptance letter will actually attend the college is 0.38 and they plan to send out 1175 acceptance letters for the upcoming year. If X = the number of students who will actually attend, what is the standard deviation of X rounded to three decimal places?.

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A sign of the organization's partnership approach to its work in communities is that Habitat a communityAs Snider considers his options and how to move forward with his change agenda, some of the people in his pool of partners include: a. Allan Donaldson b. Jimmy Carter c. The Board of Directors d. Millard Fuller e. Patrick Mahomes f. The leaders of Habitat affiliates g. VolunteersFrom a network of partners perspective, the proposal Snider is considering to rework the affiliate system might be considered a. An unqualified mistake b. A manipulation of contagion in the organization's network of relationships c. An attempt to apply the persuasion principle of "liking" d. A structural intervention in the organization's network of relationships.

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