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.
Answer: A
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