At university, students are expected to spend an average of 10 hours per week on studying, per course.

Researchers conducted a study to determine if arts students spentlessthan a mean of 10 hours per week on studying per course.

A survey of a random sample ofn=60 arts students produced a mean of 9.2 hours per week per course, with a standard deviation of 2.3 hours.

To perform a hypothesis test, whatsampling distributionof the sample mean is assumed?

A.An approximate normal distribution, with a mean of 10 and standard deviation of 2.3.

B.An approximate normal distribution, with a mean of 10 and standard deviation of 0.30.

C.An approximate normal distribution, with a mean of 9.2 and standard deviation of 0.30.

D.An approximate normal distribution, with a mean of 9.2 and standard deviation of 2.3.

E.The sampling distribution isnotnormal, as the conditions for statistical validity are not met.