According to the report the mean monthly cell phone bill was

According to the report, the mean monthly cell phone bill was $48.27 three years ago. A researcher suspects that the mean monthly cell phone bill is higher today.

(a) Determine the null and alternative hypotheses. Choose the correct answer below. OA. OB, Oc. H0: = $48.27, HI : $48.27 Ho: =$48.27; Hi: $48.27 Ho: = $48.27, H 1: > $48.27 (b) Explain what it would mean to make a Type I error. Choose the correct answer belovw. OA. The sample evidence led the researcher to believe the mean monthly cell phone bill is higher than $48.27, when in fact the mean bill is $48.27. OB. The sample evidence led the reseacher to believe the mean monthly cell phone bill is less than $48.27, when in fact the mean bill is $48.27. C. The sample evidence did not lead the researcher to believe the mean monthly cell phone bill is higher than $48.27, when in fact the mean bill is higher than $48.27

Solution

a) C

b) A

c) C