In a Study of Typical Student Grade-Point Averages (GPAs), We

Multiple Choice

In a study of typical student grade-point averages (GPAs) , we sample 16 students and find an average GPA of 2.76, with a standard deviation of 0.48.Assuming the GPAs are normally distributed, what is an interval that we can be 80% certain contains the mean student GPA?

A) (2.12, 3.40)
B) (2.61, 2.91)
C) (2.60, 2.92)
D) (2.66, 2.86)