A recent study focused on the number of times men and women send a twitter message in a day. the information is summarized below
|
Sample Size |
Sample Mean |
Pop Standard Deviation |
| Men |
25 |
20 |
5 |
| Women |
30 |
30 |
10
|
At the .01 Significance level, is there a difference in the mean number of times men and women send a twitter message in a day? What is the value of the test statistic for the bypothesis test?
A. 2.668
B. 2.672
C. 2.58
D. 2.40