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QUESTION 24 A random sample of university students was surveyed to determine the amount of time spent weekly using a personal computer. The times are shown below. If the times are normally distributed with a population variance of hours, estimate with 90% confidence the mean weekly time spent using a personal computer by all university students. The manager wanted to be 90% confident that the true mean was found 13 Sample Mean = ? (4 Decimal) QUESTION 25 A random sample of university students was surveyed to determine the amount of time spent weekly using a personal computer, The times are shown below. If the times are normally distributed with a population variance of 9 hours, estimate with 90% confidence the mean weekly time spent using a personal computer by all university students. The manager wanted to be 90% confident that the true mean was found Standard Error of the Mean = ? (4 Decimal) QUESTION 26 A random sample of university students was surveyed to determine the amount of time spent weekly using a personal computer. The times are shown below. If the times are normally distributed with a population variance of 9 hours, estimate with 90% confidence the mean weekly time spent using a personal computer by all university students. The manager wanted to be 90% confident that the true mean was found. Click Save and Submit to save and submit. Click Save All Answers to save all answers