Patsy Conducted an Experiment That Included Two Groups of Junior

Multiple Choice

Patsy conducted an experiment that included two groups of junior high girls. One group received no training while the other received a 3-hour intervention about the benefits of careers in math and science domains. Patsy compared the willingness of girls to enroll in subsequent math courses as her outcome measure. Her t test analysis indicated no differences between her treatment group and the no-exposure control. This finding is likely due to

A) preexisting group differences.
B) limited treatment exposure.
C) sampling error.
D) too small a sample size.