Author Question: Consider a large population with a mean of 150 and a standard deviation of 27 . A random sample of ... (Read 78 times)

Mr. Wonderful · **on:** Jul 24, 2018

Consider a large population with a mean of 150 and a standard deviation of 27 . A random sample of size 36 is taken from this population. The standard error of the sampling distribution of sample mean is equal to:
a. 4.17
b. 4.50
c. 5.20
d. 5.56
e. 6.00

Question 2

A statistics professor wanted to test whether the grades on statistics test were the same for upper and lower classmen. The professor took a random sample of size 12 from each and conducted a test determining that the variances were equal. For this situation, the professor should use a matched pairs t-test.
Indicate whether the statement is true or false