1. The average amount of time a random sample of 25 teenagers spent on the internet per week was 9.5 hours with a standard deviation of 2.0 hours Assume that the distribution of the amount of time spent weekly on the internet by teenagers is normal. The lower limit (to three decimal places) of a 95% confidence interval for the average amount of time spent weekly on the internet by teenagers QUESTION 2 1. A hotel chain wants to estimate the average number of rooms rented daily in each month. The population of rooms rented daily is assumed to be normally distributed for each month with a standard deviation of 24 rooms. During February, a sample of 25 days has a sample mean of 37 rooms. Using this information the lower limit (to two decimal places) of a 90% confidence interval estimate for the population mean is? QUESTION 3 1. A random sample of size 25 with a mean of $120 and a standard deviation of $35 was selected from a large normal population. The upper limit of the appropriate 95% confidence interval for the population mean is closest to: $133.72 $105.55 $106.28 $134.45 QUESTION 4 1. You are interested in determining the amount of time you spend each day on the Internet. For a random seven days, you record the time (in minutes) that you spend on the Internet. These times are listed below. 51 24 16 88 63 28 59 Assuming that the amount of time you spend on the Internet each day is normally distributed, a 90% confidence interval for the mean time you spend each day on the Internet is: