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The claim is a mean is 49 and you want to prove it is less. Test the hypothesis within a 10% level of significance. Your

The claim is a mean is 49 and you want to prove it is less. Test the hypothesis within a 10% level of significance. Your sample of 142 had a mean 48.51 and standard deviation of 19.6 Find the number of trails Test statistic Critical Z in the Decision rule Reject or Not

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