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What is the standard error of the? mean

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Suppose that you are testing the hypotheses H0?: mu=11 vs. HA?: mu>11. A sample of size 25 results in a sample mean of 11.5 and a sample standard deviation of 2.2

?a) What is the standard error of the? mean?

?b) What is the critical value of? t* for a 99?% confidence? interval?

?c) Construct a 99?% confidence interval for muμ.

?d) Based on the confidence? interval, at alpha=0.005 can you reject H0?? Explain.

Reference no: EM132310830

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