Statistics A Gentle Introduction 3rd Edition By Coolidge - Test Bank

Chapter 3 Test Questions 1. Which of the following is NOT true of the mean? a. it is appropriate for normal and skewed distributions b. it is the same as the arithmetic average c. it belongs in the category of parameters of central tendency d. it is considered an unbiased estimator 2. The “unbiased” aspect of an unbiased estimator indicates that a. it holds for all ethnic groups b. it underestimates the population value with the same tendency as it overestimates the population value c. it works in skewed as well as nonskewed distributions d. all of the above 3. The most important reason that the median is preferred to the mean is a. it is more useful than the mean in inferential statistics b. it is an unbiased estimator of the population median value c. it is a more accurate measure of central tendency in highly skewed distributions d. it is a better measure of variation 4. What is the mean (rounded to two decimal places) of the following set of first-time statistics students’ ages: 18, 18, 18, 19, 19, 19, 19, 20, 22, 22, 23, 23, 23, 24, 25, 26, 26, 29, 33, 64? a. 24.5 b. 25 c. 24.50 5. What is the median for the previous set of scores? a. 22.5 b. 22 c. 23 d. 23.5 6. What is the mode score, and what is its frequency? a. 18 and 3 b. 23 and 3 c. 19 and 4 d. 4 and 19 7. What is the standard deviation (rounded to one decimal place) for the previous set of scores? a. 10.12 b. 10.11 c. 10.1 d. 10.2 8. What is the variance (rounded to one decimal place) of the previous set of scores? a. 102.4 b. 102.3 c. 102.368 d. 102 9. What is the range of the previous set of scores? a. 18 b. 64 c. 46 d. 490 10. With respect to the mean and the median values of the previous set of scores, which of the following is true? a. the median is lower than the mean, suggesting a negative skew b. the median is lower than the mean, suggesting a positive skew c. the standard deviation is lower than the variance, suggesting a positive skew d. both b and c are correct Problems 11–15. The following is a list of annual salaries (in dollars) for a group of mid-level managers in a large company. 98,000 115,000 75,000 88,000 65,000 107,000 72,000 71,000 88,000 57,000 88,000 73,000 97,000 85,000 87,000 73,000 93,000 88,000 71,000 65,000 87,000 83,000 75,000 44,000 81,000 76,000 81,000 89,000 11. What is the mean of the salaries (rounded to a whole number)? a. 81,000 b. 81,143 c. 88,000 d. 14,864 12. What is the median of the salaries (rounded to a whole number)? a. 82,000 b. 81,111 c. 88,000 d. 14,864 13. What is the mode salary (rounded to a whole number)? a. 81,000 b. 81,111 c. 88,000 d. 14,864 14. What is the standard deviation of the salaries (rounded to a whole number)? a. 81,000 b. 81,111 c. 88,000 d. 14,701 15. The top salary in the previous set was $115,000. Would you consider that salary a. a klinker b. an outlier c. neither because it falls well within three standard deviations of the mean Problems 16–21. The following is a list of annual advertising expenses (in dollars) for a group of states’ mental health centers. 1500 11,000 7500 800 600 2350 3000 3800 500 6000 8000 500 1750 1250 50 3400 9000 890 1600 2200 16. What is the mean of the advertising expenses (rounded to a whole number)? a. $3284 b. $3285 c. $1975 d. $3241 17. What is the median of the advertising expenses (rounded to a whole number)? a. $3284 b. $3285 c. $1975 d. $3241 18. What is the mode advertising expense (rounded to a whole number)? a. $500 b. $3285 c. $1975 d. $3241 19. What is the standard deviation of the advertising expenses (rounded to a whole number)? a. $3284 b. $3285 c. $1975 d. $3241 20. The lowest advertising expense in the previous set was $50. Would you consider that expense a. a klinker b. an outlier c. neither because it falls well within three standard deviations of the mean 21. What is the range of the previous advertising expenses? a. $11,050 b. $10,050 c. $10,950 d. none of the above 22. The most common IQ tests have a standardized mean of 100 and a standard deviation of 15. Based on this information, use the empirical rule to answer the following question: If approximately 348 prospective college students are tested for their IQ, approximately how many will fall within one standard deviation of the mean? a. 345 b. 338 c. 313 d. 237 23. Approximately how many students will have at least an IQ of 100 but not greater than 115? a. 68% b. 169 c. 174 d. 118 24. Approximately how many students will have IQs greater than 100? a. 118 b. 174 c. 169 d. 237 25. Approximately how many students should have IQs greater than 130? a. 9 b. 18 c. 27 d. 36 Chapter 3: Statistical Parameters 1. a. it is appropriate for normal and skewed distributions 2. b. it underestimates the population value with the same tendency as it overestimates the population value 3. c. it is a more accurate measure of central tendency in highly skewed distributions statistics test banks, Keyword Tool Pro, Do you need this information?, Keyword Tool Pro provides search volume data for English keywords., statistics test bank questions and answers, statistics test taker, ap statistics test breakdown, ap statistics test 2b, basic statistics test questions and answers, statistics question bank pdf class 12, statistics question bank pdf class 11, common test statistics, how statistics is used in banking sector, c test statistics, e test statistics, f-statistic tests the null hypothesis, g-test statistics, g test statistics calculator, how to find test banks reddit, j test statistics, jones and bartlett test bank, jbstatistics, k-s test statistic, how to find test statistic linear regression, m&t bank stress test results, occ bank examiner test questions, statistics question bank pdf, statistics question bank 2nd puc pdf, p test statistics example, what percent of statistics are false, test statistic stats, ap statistics tests, ap statistics test booklet, ap statistics test questions, ap statistics test answer key, what are test bank questions, test bank answers, q test statistics, r statistical tests, r statistical tests cheat sheet, test statistics t calculator, t-tests statistics, us bank test, u-test statistics, v test statistics, w test statistic, bank statistics, z-statistic test calculator, z statistic test, test statistics symbol, statistics question bank 1st puc, location test statistics, test score statistics, basic statistics tests, statistics test 2 answers, 2 sample tests, statistics test 3, statistics test 3 answers, statistics test 4, chapter 4 statistics test answers, ap statistics test 4c, ap statistics test 5b answer key, test 5b ap statistics, 6th grade statistics test pdf, ap statistics test 6b answer key, ap statistics test 6c answer key, ap statistics test 7b, ap statistics test 7b answer key, ap statistics test 7c, ap statistics test 8b, ap statistics test 8b answer key, ap statistics test 8a, test bank 911, ap statistics test 9b answer key.