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. You find 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 tend to 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.