Data on salaries in the public school system are published annually by ateachers' association. The mean annual salary of(public) classroom teachers is $54.5 thousand. Assume a standard deviation of $8.4 thousand. Complete parts(a) through(e) below.

a. Determine the sampling distribution of the sample mean for samples of size 64.

The mean of the sample mean is x=$

nothing

.type an integer or a decimal. Do notround.)