Mary, a colleague of yours, wants to test the effectiveness of a new lesson plan on two different groups of students. She wants to perform a t-test, but she is not sure whether to use a paired or unpaired test. Base on the information provided, how would you advise your colleague?

To use a paired t-test

Step-by-step explanation:

t-tests are essentially tests carried out to compare two different groups to check if there is a major difference in their performances or results which may be related in certain characteristics.

A paired (correlated) t-test is used when there are matched pair of similar units or instances of repeated measurements.

In this case, Mary has to use a paired t-test because the samples (students) have high similarity in characteristics. The students in question has to be from the same class to test her hypothesis (similar characteristics).

an altitude of 15,000 feet

step-by-step explanation: