In Order to Estimate the Average Time Spent Per Student

Multiple Choice

In order to estimate the average time spent per student on the computer terminals at a local university, data were collected for a sample of 64 business students over a one-week period. Assume the population standard deviation is 1.6 hours. With a .95 probability, the margin of error is approximately

A) .392.
B) 1.96.
C) .20.
D) 1.645.