Records show that the time a person spends for a shower is normally distributed. If a random sample of 10 people data has a mean shower time of 15 minutes and a standard deviation of 5 minutes, find a...

Records show that the time a person spends for a shower is normally distributed. If a random sample of 10 people data has a mean shower time of 15 minutes and a standard deviation of 5 minutes, find a 90% confidence interval for the true mean time spent in the shower

What distribution is used in constructing confidence intervals in this problem?

What is Maximal Margin of Error (E) at 90% confidence?

Construct a 90% confidence interval