Exhibit 8-1 in Order to Estimate the Average Time Spent on the on the Computer

Multiple Choice

Exhibit 8-1
In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours.
-Refer to Exhibit 8-1. With a 0.95 probability, the margin of error is approximately

A) 0.39
B) 1.96
C) 0.20
D) 1.64