Question: A research organization tested microwave ovens. At = 0.10, is there a significant difference in the average prices of the three types of oven?

A research organization tested microwave ovens. At Î± = 0.10, is there a significant difference in the average prices of the three types of oven?

A computer printout for this exercise is shown. Use the P-value method and the information in this printout to test the claim.

The null hypothesis was rejected. Use the ScheffÃ© test when sample sizes are unequal or the Tukey test when sample sizes are equal, to test the differences between the pairs of means. Assume all variables are normally distributed, samples are independent, and the population variances are equal.

Watts 900 270 135 200 1000 800 180 155 240 245 190 215 160 230 250 120 250 200 140 200 210 140 180 130 Computer Printout for Exercise l ANALYSIS OF VARIANCE SOURCE TABLE Source Bet Groups W/I Groups Total DESCRIPTIVE STATISTICS Condit df Sum of Squares 21729.735 20402. 083 42131.818 Mean Square p-value 2 19 10864.867 1073.794 10.118 0.00102 21 Means St Dev 1000 900 800 233.333 203.12!5 155.62!5 28.23 39.36 28.21

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