If You Wish to Estimate with 95% Confidence the Average

Multiple Choice

If you wish to estimate with 95% confidence the average number of miles that students living off-campus commute to classes every day, a random sample of 20 students produced a mean equal to 5.2 miles and a standard deviation of 3.05 miles. Then, the appropriate critical value is:

A) 1.96
B) 2.086
C) 2.093
D) 1.7291
E) 2.58