Author Question: The expected value of the sampling distribution of the sample mean equals the population mean : a. ... (Read 179 times)

ahriuashd · **on:** Jun 24, 2018

The expected value of the sampling distribution of the sample mean equals the population mean :
a. only when the population is normally distributed.
b. only when the sample size is large.
c. only when the population is infinite.
d. for all populations.

Question 2

A store manager gives a pre-employment examination to new employees. The test is scored from 1 to 100 . He has data on their sales at the end of one year measured in dollars. He wants to know if there is any linear relationship between pre-employment examination score and sales. An appropriate test to use is the t-test of the population correlation coefficient.
Indicate whether the statement is true or false