Explore BrainMass

# Two Populations

Not what you're looking for? Search our solutions OR ask your own Custom question.

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

The email usage for two different plants of a large company was compared at level of significance 0.05. A sample of 50 employees was selected at each plant. The mean number of email messages sent per employee for one plant was 15.5 per week and the standard deviation was 5.0. For the other plant, the mean was 18.4 and the standard deviation was 3.6. For the test of equal population means versus unequal population means, the absolute value for the computed test statistic, the critical values, and the p-value respectively are: Which one?
a) 2.33, + - 1.96, 0.0008
b) 3.33, + - 2.33, 0.0008
c) 3.33, + - 1.96, 0.0008
d) 2.33, + - 1.65, 0.0004

https://brainmass.com/statistics/students-t-test/two-populations-10378

#### Solution Preview

The difference of mean is
Dm=18.4-15.5=2.9
The standard error of the difference is ...

#### Solution Summary

The solution provides a comprehensive answer to the question going into a lot of details. The solution satisfies all the requirements of the question.

\$2.49