Consider the following null and alternative hypotheses. H0: μ = 120 versus H1: μ > 120 A random sample of 121 observations taken from this population produced a sample mean of 123.1. The population standard deviation is 16. a) If this test is made at the 2.5% significance level, would you reject the null hypothesis? b) What is the probability of making a Type I error in part a? (Show all your work)
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