Consider the cigar tar content data first presented in Exercise

Consider the cigar tar content data first presented in Exercise

Consider the cigar tar content data first presented in Exercise 8-82.
(a) Can you support a claim that mean tar content exceeds 1.5? Use a = 0.05
(b) What is the P-value of the test statistic computed in part (a)?
(c) Compute the power of the test if the true mean tar content is 1.6.
(d) What sample size would be required to detect a true mean tar content of 1.6 if we wanted the power of the test to be at least 0.8?

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