A company randomly selected nine office employees and secretly monitored
A company randomly selected nine office employees and secretly monitored their computers for one month. The times (in hours) spent by these employees using their computers for non–job-related activities (playing games, personal communications, etc.) during this month are as follows:
Assuming that such times for all employees are normally distributed, make a 95% confidence interval for the corresponding population mean for all employees of this company.
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