7. Exercise 10.45 eBook Exercise 10.451 In a completely randomized experimental

Question

7. Exercise 10.45 eBook Exercise 10.451 In a completely randomized experimental design, three brands of paper towels were tested for their ability to absorb water. Equal-size towels were used, with four sections of towels tested per brand. The absorbency rating data follow. At a.05 level of significance, does there appear to be a difference in the ability of the brands to absorb water (to 2 decimals, if necessary)? Brand 91 100 83 96 94 89 76 89 Sample Mean Sample Variance Select your answerthe null hypothesis that the mean absorbency ratings for the three brands are equal

Explanation / Answer

The statistical software output for this problem is:

Summary statistics:

Hence,

Reject the null hypothesis.

Column Mean Variance x 92 30 y 97 6 z 84 35.333333

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