Refer to the data on the weight of wolves in Table D.9 of the Data Bank. A

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Refer to the data on the weight of wolves in Table D.9 of the Data Bank. A computer analysis produces the output

(a) What is the conclusion to testing the equality of mean weights at level Î± = .05?
(b) Test the null hypothesis that males weigh an average of 5 pounds more than females against a two-sided alternative. Take Î± = .05.

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Statistics Principles And Methods

ISBN: 9780470904114

7th Edition

Authors: Richard A. Johnson, Gouri K. Bhattacharyya

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Question Posted: Apr 19, 2016 11:07 AM

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Refer to the data on the weight of wolves in Table D.9 of the Data Bank. A

Question:

Two-sample T for Male wt vs Female wt N 11 Mean 91.9 stDev 12.4 10.1 Male wt Female wt873.9 T-Test of difference 0 (vs not s) T-value 3.38 P-value 0.004 DF 17

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a Since the pvalue is 0004 the difference between the mean weights is significant at the 005 level ...View the full answer

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