A Statistics Professor Has 115 Students in a Statistics Class

Multiple Choice

A statistics professor has 115 students in a statistics class and would like to estimate the number of hours each student studied for the last exam. A random sample of 41 students was found to study an average of 7.3 hours with a standard deviation of 1.9 hours. The 98% confidence interval to estimate the average number of hours studying for the exam is _____.

A) (6.72, 7.88)
B) (5.18, 9.42)
C) (5.82, 8.79)
D) (6.11, 8.49)