Concept explainers
School Lunch
A nutritionist decided to see if there was a difference in the number of calories served for lunch in elementary and secondary schools. She selected a random sample of eight elementary schools and another random sample of eight secondary schools in Pennsylvania. The data are shown.
Elementary | Secondary |
648 | 694 |
589 | 730 |
625 | 750 |
595 | 810 |
789 | 860 |
727 | 702 |
702 | 657 |
564 | 761 |
1. Are the samples independent or dependent?
2. What are the hypotheses?
3. What nonparametric test would you use to test the claim?
4. What critical value would you use?
5. What is the test value?
6. What is your decision?
7. What is the corresponding parametric test?
8. What assumption would you need to meet to use the parametric test?
9. If this assumption were not met, would the parametric test yield the same results?
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Elementary Statistics: A Step By Step Approach
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