You do a Student’s t-test to compare the average test scores of sample groups from populations A and B.
Group A averaged 10 points higher than group B. Youfind that this difference is significant, with a p-value of
0.03. What does that mean?

A.
There is a 3% chance that you have identified a difference between the populations when in reality there is
none.

B.
The difference in scores between a sample from population A and a sample from population B will tendto
be within 3% of 10 points.

C.
There is a 3% chance that a sample group from population A will score 10 points higher that a sample
group from population B.

D.
There is a 97% chance that a sample group from population A will score 10 points higher that a sample
group from population B.