Without performing any calculations, use the stem and leaf plots to determine wh

Question

Without performing any calculations, use the stem and leaf plots to determine which statement is accurate. A. Date sets (i) and (ii) have the same standard deviation. B) Data set (i) has the smallest standard deviation. C) Data sets (ii) has the greatest standard deviation. D) Data sets (i) and (iii) have the same range. The mean length of a human pregnancy is 266 days, with a standard deviation of 9 days. Use the Empirical Rule to determine the percentage of women whose pregnancies are between 257 and 275 days. (Assume the data set has a bell-shaped distribution) A) 68% B) 99.7% C) 50% D) 95% The weights (in pounds) of 30 preschool children are listed below. Find the five number summary. 25 25 26 26.5 27 27 27.5 28 28 28.5 29 29 30 30 30.5 31 31 32 32.5 32.5 33 33 34 34.5 35 35 37 37 38 38 A) Min = 25, Q_1 = 28, Q_2 = 30.5, Q_3 = 34, Max = 38 B) Min = 25, Q_1 = 27.5, Q_2 = 30.5, Q_3 = 33.5, Max = 38 C) Min = 25, Q_1 = 28, Q_2 = 30.75, Q_3 = 34, Max = 38 D) Min = 25, Q_1 = 27.5, Q_2 = 30.75, Q_3 = 33, Max = 38 Many firms use on-the-job training to teach their employees computer programming. Suppose you work in the personnel department of a firm that just finished training a group of its employees to program, and you have been requested to review the performance of one of the trainees on the final test that was given to all trainees. The mean and standard deviation of the test scores are 81 and 3, respectively, and the distribution of scores is bell-shaped and symmetric. Suppose the trainee in question received a score of 77. Compute the trainee's z -score. A) z = -1.33 B) z = 0.91 C) z = 1.33 D) z = -0.91 The test scores of 30 students are listed below. Find the percentile that corresponds to a score of 74. A) 50the percentile B) 40th percentile C) 90th percentile D) 30th percentile

Explanation / Answer

7. Option A is correct.

8. Option A is correct.

9. Option C is correct.

10th and 11th aren't complete images so won't be able to provide answers of those two.

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