Concept explainers
Compute the standard deviation for both sets of data presented in problem 3.13 and reproduced here. Compare the standard deviation computed for freshmen with the standard deviation computed for seniors. What happened? Why? Does this change relate to what happened to the
Freshmen | ||||
10 | 43 | 30 | 30 | 45 |
40 | 12 | 40 | 42 | 35 |
45 | 25 | 10 | 33 | 50 |
42 | 32 | 38 | 11 | 47 |
22 | 26 | 37 | 38 | 10 |
Seniors | ||||
10 | 45 | 35 | 27 | 50 |
35 | 10 | 50 | 40 | 30 |
40 | 10 | 10 | 37 | 10 |
40 | 15 | 30 | 20 | 43 |
23 | 25 | 30 | 40 | 10 |
3.13
a. Compute the
10 | 43 | 30 | 30 | 45 |
40 | 12 | 40 | 42 | 35 |
45 | 25 | 10 | 33 | 50 |
42 | 32 | 38 | 11 | 47 |
22 | 26 | 37 | 38 | 10 |
b. These same 25 students completed the same survey during the senior year. Compute the median and mean for this second set of scores, and compare them to the earlier set. What happened?
10 | 45 | 35 | 27 | 50 |
35 | 10 | 50 | 40 | 30 |
40 | 10 | 10 | 37 | 10 |
40 | 15 | 30 | 20 | 43 |
23 | 25 | 30 | 40 | 10 |
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Check out a sample textbook solutionChapter 4 Solutions
EBK THE ESSENTIALS OF STATISTICS: A TOO
Additional Math Textbook Solutions
Elementary Statistics (13th Edition)
Elementary Statistics: A Step By Step Approach
Elementary Statistics: A Step By Step Approach
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill