1. 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 |
Population Standard Deviation |
|
| Men | 28 |
29 |
15 |
| Women | 27 |
38 |
19 |
At the 0.01 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 this hypothesis test?
a) -1.9452
b) -2.4727
c) 2.6718
d) 2.3988
