Scenario 1: A random sample of 400 adults was chosen (191 women and 209 men). At the end of the week, each of the 400 subjects reported the total amount of time (in minutes) that he or she watched TV during that week.

Here are the histograms (Links to an external site.) of the data if you would like to see them.

The conditions for use of the T-test are met [ Select ] ["valid", "invalid"] .

Scenario 2: A random sample of 25 women and another random sample of 25 men was chosen. At the end of the week, each of the 50 subjects reported the total amount of time (in minutes) that he or she watched TV during that week.

Here are the histograms (Links to an external site.) of the data if you would like to see them.

The conditions for use of the T-test are met [ Select ] ["valid", "invalid"] .

Scenario 3:

A random sample of 50 married couples was chosen, which was split into a sample of 50 men and a sample of 50 women. At the end of the week, each of the 100 subjects reported the total amount of time (in minutes) that he or she watched TV during that week.

Here are the histograms (Links to an external site.) of the data if you would like to see them.

The conditions for use of the T-test are met [ Select ] ["valid", "invalid"] .