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Standard deviation of the sample

The mean and the standard deviation of the sample of 40 trash bag breaking strengths are 50.575 and 1.6438, respectively. ( 1) Test H 0 : m 50 versus H a : m 50 by setting a equal to .05 and using a critical value rule. ( 2) Interpret the ( computer calculated) p- value of .0164 for the test. That is, explain how much evidence there is that H 0 is false.

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## Q : Null and alternative hypotheses

State your null and alternative hypotheses. Calculate the mean and standard deviation for each group. Compare the two group means and test your hypothesis. State your conclusion in terms of the hypothesis and report the associated probability.