Question: 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

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. If the sample mean is 9 hours, then the 95% confidence interval is:

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