Author Question: If we are testing for the difference between the means of two independent populations with equal ... (Read 71 times)

Sportsfan2111 · **on:** Jun 24, 2018

If we are testing for the difference between the means of two independent populations with equal variances, samples of n1 = 15 and n2 = 15 are taken, then the number of degrees of freedom is equal to
a. 13 c. 28
b. 14 d. 29

Question 2

Random variation is one of the four different components of a time series. It is caused by irregular and unpredictable changes in a time series that are not caused by any other component. It tends to mask the existence of the other more predictable components.
Indicate whether the statement is true or false