Concept explainers
For Exercises 3 through 8, the null hypothesis was rejected. Use the Scheffe test when
6. Exercise 17 in Section 12-1.
17. Microwave Oven Prices A research organization tested microwave ovens. At a = 0.10, is there a significant difference in the average prices of the three types of oven?
Watts | ||
1000 | 900 | 800 |
270 | 240 | 180 |
245 | 135 | 155 |
190 | 160 | 200 |
215 | 230 | 120 |
250 | 250 | 140 |
230 | 200 | 180 |
200 | 140 | |
210 | 130 |
A computer printout for this exercise is shown. Use the P-value method and the information in this printout to test the claim. (The information in this exercise will be used in Exercise 6 of Section 12-2.)
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Elementary Statistics: A Step By Step Approach
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