work doesnt have to be shown

QUIZ: Quiz: ... Data on salaries in the public school system are published annually by a teachers' association. The mean annual salary of (public) classroom teachers is $50.8 thousand. Assume a standard deviation of $9.2 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 u = $ . (Type an integer or a decimal. Do not round.) The standard deviation of the sample mean is o = $ .(Type an integer or a decimal. Do not round.) b. Determine the sampling distribution of the sample mean for samples of size 256. The mean of the sample mean is u = $ .(Type an integer or a decimal. Do not round.) The standard deviation of the sample mean is o = $ .(Type an integer or a decimal. Do not round.)