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Five step approach to T test

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A random sample of 15 observations provided x-bar = 182 and s = 12.

(a) Test H0: &#956; = 190 versus H1: &#956; < 190 at &#945; = .05. State your assumption about the population distribution.
(b) What can you say about the P-value of the test statistic calculated in part (a)?

A weight loss program advertises "LOSE 40 POUNDS IN 4 MONTHS." A random sample of n = 25 customers has x-bar =32 pounds lost and s = 12. Test H0:&#956; = 40 against H1:&#956; < 40 with &#945; = .05.

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Solution Summary

Step by step method for testing the hypothesis under 5 step approach is discussed here. Excel template for each problem is also included. This template can be used to obtain the answers of similar problems.

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