Given the supplied information, interpret the results. A dean compared the GPA of a sample (N = 20) of students who spent more than two hours a night on homework (M =3.20, s = 0.50) to the average GPA at her college (μ = 2.80). She was curious if homework had any relationship, either positive or negative, with GPA. She found:

• tcv = 2.093

• t = 3.64

• d = 0.80

• r 2 = 41%

• 95% CI [0.17, 0.63]