# New York University STAT-UB STAT-UB UB 103 Suppose that 60 internet-users are randomly selected and monitored to see how long each user spends on Facebook daily. The average amount of time

New York University STAT-UB STAT-UB UB 103 Suppose that 60 internet-users are randomly selected and monitored to see how long each user spends on Facebook daily. The average amount of time

# Suppose that 60 internet-users are randomly selected and monitored to see how long

each user spends on Facebook daily. The average amount of time spent on Facebook

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New York University STAT-UB STAT-UB UB 103 Suppose that 60 internet-users are randomly selected and monitored to see how long each user spends on Facebook daily. The average amount of time
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among these users turned out to be 40 minutes per day with a standard deviation of 15

minutes.

(a) Find a Confidence interval for the average amount of time spent on Facebook by

all internet-users which has a confidence level of 99%.

(b) What does the confidence interval in (a) tell us?

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