You want to test H0 : = 4 versus H1: 4, so you compute
Question:
You want to test H0 : μ = 4 versus H1: μ ≠ 4, so you compute a 95% confidence interval for μ. The 95% confidence interval is 5.1 < μ < 7.2.
a. Do you reject H0 at the α = 0.05 level?
b. Your friend thinks that α = 0.01 is a more appropriate significance level. Can you tell from the confidence interval whether to reject at this level?
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