A Professor Was Curious About Her Students' Grade Point Averages $3.01 \pm 2.576 \frac{0.534}{\sqrt{15}}$

Multiple Choice

A professor was curious about her students' grade point averages (GPAs) . She took a random sample of 15 students and found a mean GPA of 3.01 with a standard deviation of 0.534. Which of the following formulas gives a 99% confidence interval for the mean GPA of the professor's students?

A) $3.01 \pm 2.576 \frac{0.534}{\sqrt{15}}$

B) $3.01 \pm 2.977 \frac{0.534}{\sqrt{14}}$

C) $3.01 \pm 2.947 \frac{0.534}{\sqrt{15}}$

D) $3.01 \pm 2.977 \frac{0.534}{\sqrt{15}}$

E) $3.01 \pm 2.947 \frac{0.534}{\sqrt{14}}$