A random sample of nine students reported the number of times per day they use their phones: 10 5 10 5 10 5 10 5 5 assume the number of phone used is normally distributed and the population standard d

A random sample of nine students reported the number of times per day they use their phones: 10 5 10 5 10 5 10 5 5 assume the number of phone used is normally distributed and the population standard deviation is 6 what is the 95% confidence interval for m?