Open MyStatLab (Publisher Content) and read Chapter 4 in your eText.
From the left sidebar select "Chapter Contents." Then select "Chapter 10" and read Sections 10.1-10.4
Watch the following Video content on the difference of means.
Hypothesis Test for Difference of Means:
Video from Khan Academy and use covered by license. http://creativecommons.org/licenses/by-nc-sa/3.0/us/legalcode (Links to an external site.) No changes were made.