# Question

Consider the null hypothesis H0: µ = 12.80. A random sample of 58 observations is taken from this population to perform this test. Using α = .05, show the rejection and non-rejection regions on the sampling distribution curve of the sample mean and find the critical value(s) of t for the following.

a. A right-tailed test

b. A left-tailed test

c. A two-tailed test

a. A right-tailed test

b. A left-tailed test

c. A two-tailed test

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