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Question;29. Which of the following is not a;measure of central tendency?;a. the standard deviation;b. the mean;c. the mode;d. the median;e. all of the above are measures of;central tendency;30. Which of the following is not a;measure of spread or dispersion?;a. the standard deviation;b. the range;c. the mean;d. the variance;e. all of the above are measures of;spread;31. The measure most likely affected;by extreme values or outliers is the;a. median;b. mean;c. mode;d. inter-quartile range;e. none of the above;32. Which of the following;statements is correct?;a. the range is found by taking the;difference between the largest and smallest values and dividing by 2;b. the inter-quartile range is found;by taking the difference between the first and third quartiles and dividing;that value by 2;c. the standard deviation is;expressed in terms of the original units of measurement but the variance is not;d. the value of the standard;deviation may be positive or negative but the value of the variance will always;be positive;e. none of the above;33. Which of the following;statements are correct?;a. the mean is a measure of;deviation in a data set;b. the standard deviation is a;measure of dispersion;c. the range is a measure of central tendency;d. the median is a measure of;dispersion;e. none of the above;34. Which of the following is the;weakest (or least useful) measure of dispersion?;a. the range;b. the standard deviation;c. the coefficient of variation;d. the variance;e. none of the above;35. Which of the following is not a;measure of variability in a data set?;a. the range;b. the variance;c. the inter-quartile range;d. the median;e. none of the above;36. For a negatively skewed distribution with a single mode;a. Mean = median = mode;b. Mean median? mode;d. Mean = median but one is unable to tell where the mode would lie;e. None of the above;37. For a perfectly symmetrical distribution with a single mode;a. Mean = median = mode;b. Mean median? mode;d. Mean = median but one is unable to tell where the mode would lie;e. None of the above;38. For a positively skewed distribution with a single mode;a. Mean = median = mode;b. Mean median? mode;d. Mean = median but one is unable to tell where the mode would lie;e. None of the above;39. A restaurant conducts a survey;to determine the quality of their service. Customers were asked to rate their;service as either very poor, poor, average, good or excellent. The most;appropriate measure of central location for this data set is;a. Mean;b. Coefficient of Variation;c. Standard deviation;d. Variance;e. Median;40. Given a;positively skewed distribution with a median of 10 and a mode of 8. Which of;the following is not a possible;value for the mean?;a. 12;b. 11;c. 6;d. 18;e. 15;41. Given a;negatively skewed distribution with a median of 8 and a mode of 10. Which of;the following is not a possible;value for the mean?;a. 7;b. 1;c. 12;d. 5;e. 3;42. Which of the following data sets has the largest variance?;a. 1, 2, 3, 4, ?..100;b. 11, 12, 13,?.110;c. 2, 4, 6, ?200;d. 1001, 1002, 1003, ?.1100;e. all of the above have equal variance;43. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 55, 80, 49;91, 66. What is the sample variance for;this sample?;a. 18.46;b. 19.46;c. 378.71;d. 389.21;e. 329.98;44. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 52, 80, 49;91, 66. What is the sample variance for;this sample?;a. 19.73;b. 19.46;c. 378.71;d. 389.21;e. 329.98;45. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 55, 80, 49;19, 66. What is the sample variance for;this sample?;a. 23.48;b. 19.46;c. 378.71;d. 551.51;e. 329.98;46. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 43, 98, 78, 76, 55, 80, 49;91, 66. What is the sample variance for;this sample?;a. 18.46;b. 17.78;c. 316.01;d. 389.21;e. 329.98;47. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 55, 80, 49;91, 66. What is the range of marks for;this sample?;a. 64;b. 98;c. 79;d. 55;e. 91;48. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 52, 80, 49;91, 66. What is the range of marks for;this sample?;a. 64;b. 98c. 79;d. 55;e. 91;49. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 55, 80, 49;19, 66. What is the range of marks for;this sample?;a. 64;b. 98;c. 79;d. 55;e. 91;50. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 43, 98, 78, 76, 55, 80, 49;91, 66. What is the range of marks for;this sample?;a. 64;b. 98;c. 79;d. 55;e. 91;51. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 55, 80, 49;91, 66. What is the coefficient of;variation for this sample?;a. 0.28;b. 0.30;c. 0.38;d. 0.25;e. 0.50;52. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 52, 80, 49;91, 95. What is the coefficient of;variation for this sample?;a. 0.28;b. 0.30;c. 0.38;d. 0.25;e. 0.50;53. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 55, 80, 49;19, 66. What is the coefficient of;variation for this sample?;a. 0.28;b. 0.30;c. 0.38;d. 0.25;e. 0.50;54. The following marks are the test 1;marks for 10 randomly selected STA100 students: 67, 43, 98, 78, 76, 55, 80, 49;91, 66. What is the coefficient of;variation for this sample?;a. 0.28;b. 0.30;c. 0.38;d. 0.25;e. 0.50;55.;The following calculations on a data set have been done for you:?x = 110,?x2 = 1235, n = 10. What is the coefficient of variation?;a.;0.152;b.;0.495;c.;0.754;d.;1.047;e. 0.500;56.;The following calculations on a data set have been done for you:?x = 110,?x2 = 1235, n = 12. What is the coefficient of variation?;a.;0.152;b.;0.495;c.;0.754;d.;1.047;e. 0.500;57.;The following calculations on a data set have been done for you:?x = 110,?x2 = 1235, n = 15. What is the coefficient of variation?;a.;0.152;b.;0.495;c.;0.754;d.;1.047;e. 0.500;58.;The following calculations on a data set have been done for you:?x = 110,?x2 = 1235, n = 20. What is the coefficient of variation?;a.;0.152;b.;0.495;c.;0.754;d.;1.047;e. 0.500;59. Which of the following data sets has a mean of 3 and a variance;of 0?;a. 3 3 3;3 3;b. 2 3 4;4 2;c. 1 3 5;1 4;d. 9 9 9;9 9;e. None of the above;60. The length of the box in the box and whisker plot;portrays the;a. Median;b. Upper quartile;c. Mean;d. Range;e. Interquartile;range

 

Paper#62448 | Written in 18-Jul-2015

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