Res 341 final exams


Published on

Res 341 final exam, res 341, res 341 week 4

  • Be the first to comment

  • Be the first to like this

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

Res 341 final exams

  1. 1. RES 341 Final Exam CLICK & DOWNLOAD SOLUTION1)RES 341 Final Exam Unstructured interviews are best used forA. measuring worker productivity.B. solving manufacturing defect problemsC. assessing management effectivenessD. asking individualized questions with no specific order2) A recent study of breast cancer revealed that 13% of the women in the sample used antibioticsmore than 500 days in their lifetime. Further, 79% of these “heavy antibiotics users” developedbreast cancer. According to the American Cancer Society, one in twelve women will developbreast cancer at some time in her life. Of the numbers mentioned, which are parameters?A. 13% and 79%B. 13% and one in twelveC. 79% and 500 daysD. 79% and one in twelve3) Basic business research methods would be used toA. identify factors that affect worker absenteeismB. evaluate a retail store’s inventory tracking systemC. assess consumer acceptance of a redesigned computer keyboardD. determine the effect of a 10% price increase on the sale of school supplies4) The collection and summarization of the socioeconomic and physical characteristics of theemployees of a particular firm is an example ofA. inferential statisticsB. descriptive statisticsC. a parameterD. an estimation5) Which of the following is an example of statistical inference?A. Counting the number of patients who file malpractice suits after being discharged fromhospitals in New YorkB. Calculating the mean number of fruit trees damaged by Mediterranean fruit flies inCalifornia last yearC. Calculating the mean age of patients discharged from hospitals in New York in 1997D. Calculating the amount of fly spray needed for your orchard next season6) A logically conjectured statement that describes the relationship between two or morevariables and is formulated for empirical testing is aA. hypothesisB. theoryC. constructD. thesis statement7) The variable that causes a measurable effect or change on the dependent variable is
  2. 2. A independentB. dependentC. interveningD. moderating8) Survey questionnaires may be effectively used for research to determineA. defect rates in automobile parts coming off a production lineB. the effect of price changes on sales volumeC. the attitudes of prospective votersD. how temperature and humidity affect concrete cure time9) A company is designing a survey to obtain information on the reliability of a product it sells.To obtain the most valid research information, who should the company send this type of surveyto?A. A random sample of its customersB. VendorsC. Customers who have bought the productD. Employees10) The following practice is considered ethical when conducting business research:A. Disclosing some, but not all, financial interests that may affect researchB. Allowing participants to withdraw from a business research project whenever they ask to dosoC. Keeping minimal records of research activities and research designD. Revealing only a small part of the purpose of the business research project11) If a population distribution is skewed to the right, then given a random sample from thatpopulation, one would expect that theA. median is greater than the meanB. mode is equal to the meanC. median is less than the meanD. median is equal to the mean12)Textbook Price Number of Textbooks$25 to $35 2$35 to $45 16$45 to $55 5$55 to $65 7$65 to $75 20Estimate the standard deviation of the price of a textbook.A. 14.03B. 33.85C. 196.78D. 729.0013)Textbook Price Number of Textbooks$25 to $34.99 2$35 to $44.99 16
  3. 3. $45 to $54.99 5$55 to $64.99 7$65 to $74.99 20Estimate the mean price of a textbook.A. $554.00B. $11.08C. $60.00D. $55.4014) A supermarket has determined that daily demand for eggs has a bell-shaped distribution,with a mean of 55 cartons and a standard deviation of six cartons. If the supermarket begins eachmorning with a stock of 61 cartons of eggs, approximately what percentage of days will there bea surplus of eggs?A. 16%B. 18%C. 68%D. 84%15) Which of these measurement scales has a rank order associated with its use?A. RatioB. OrdinalC. NominalD. Likert16) Identify the scale that has no meaningful zero.A. NominalB. OrdinalC. IntervalD. Ratio17) __________ is a measure of the chance that an uncertain event will occur.A. Random experimentB. Sample spaceC. ProbabilityD. A complement18) The Information Commons in the main library has 150 personal computers. The probabilitythat any of them will require repair on a given day is 0.02. To find the probability that 25 of thecomputers will require repair, one would use what type of probability distribution?A. BinomialB. PoissonC. NormalD. Hypergeometric19) A multiple-choice test has 20 questions. There are four choices for each question. A studentcomes to class with four different colored balls of identical shape and size in her pocket. She hasdecided to draw one ball from her pocket per question and allow the color of the ball to select theanswer for each question. What type of probability distribution can be used to figure out herchance of getting 10 questions right?A. HypergeometricB. PoissonC. Normal
  4. 4. D. Binomial20) Which of the following cannot generate a Poisson distribution?A. The number of people at a movie theatre on Friday eveningB. The number of customers arriving at an automatic teller machine (ATM) in a minuteC. The number of defects in a new automobileD. The number of goals in the World Cup soccer game21) Which of the following is a characteristic of every binomial distribution?A. Each outcome is dependent on the previous outcome.B. The probability of success increases from trial to trial.C. Each outcome is mutually exclusive.D. The outcome of the trial depends on the number of trials.22) The average qualifying speed for a championship NASCAR® race is 145.65 mph and thestandard deviation is 9.45 mph. Only drivers who obtain z-scores greater than 1.2 will qualify forthe race. If the speeds are normally distributed, what minimum speed must be clocked tocompete for the trophy?A. 146.9 mphB. 155.2 mphC. 157.0 mphD. 174.8 mph23) Trudy Jones recently completed her certification examination and learned that her z-scorewas -2.5. The examining board also informed her that a failure to pass would equal all scores thatwere one or more standard deviations below the mean and that those with scores higher than twostandard deviations above the mean would receive a special commendation award. Trudy canconclude that sheA. failed the examB. needs more data to determine if she passed the examC. passed the exam and will receive a special commendation awardD. passed the exam, but no commendation award is forthcoming24) The use of the student’s distribution requires which of the following assumptions?A. The sample size is greater than 30.B. The population variance is known.C. The population is normal.D. The sample is drawn from a positively skewed distribution.25) The standard error of the sample mean is equal to 5 when n=25. If the sample size increasesby a factor of four, how will the standard error change?A. It will be double.B. It will be cut in half.C. It will be cut to 1/4 of 5.D. It will quadruple.26) For a sample size of 1, the sampling distribution of the mean will be normally distributedA. regardless of the shape of the populationB. only if the shape of the population is positively skewedC. only if the population values are larger than 30D. only if the population is normally distributed27) A 95% confidence interval for the population mean indicates that
  5. 5. A. with an infinite number of samples, there’s a 5% chance that the population mean will beoutside the intervalB. more sampling is required to increase the confidence interval to 100%C. the sampling process is biasedD. 95% of the observations from any sample will fall within the interval28) A random sample of 16 ATM transactions at the First National Bank of Flintrock revealed amean transaction time of 2.8 minutes with a standard deviation of 1.2 minutes. The width, inminutes, of the 95% confidence interval for the true mean transaction time isA. ± 0.639B. ± 0.588C. ± 0.300D. ± 2.13129) All other things being equal, which is narrower, a 95% confidence interval with n=100 or a99% confidence interval with n=30?A. The 95% confidence intervalB. The 99% confidence intervalC. The same widthD. Need the margin of error to tell30) When the only sources of variation in a production process are caused by chance, the processis said to beA. out of balance but under controlB. out of control but in balanceC. under controlD. out of control