Author Question: Assume that the histogram of a data set is symmetric and bell shaped, with a mean of 75 and standard ... (Read 166 times)

B · **on:** Jun 24, 2018

Assume that the histogram of a data set is symmetric and bell shaped, with a mean of 75 and standard deviation of 10 . Then, approximately 95 of the data values were between 55 and 95.
a. True
b. False
Indicate whether the statement is true or false

Question 2

The pooled-variances t-test requires that the two population variances need not be the same.
Indicate whether the statement is true or false