According to the report the mean monthly cell phone bill was

According to the report, the mean monthly cell phone bill was $48.57 three years ago. A researcher suspects that the mean monthly cell phone bill is different today. Determine the null and alternative hypotheses. Choose the correct answer below. Explain what it would mean to make a Type I error. Choose the correct answer below. Explain what it would mean to make a Type II error. Choose the correct answer below.

Solution

(a) Option B

(b) Option A

(c) Option A