The distribution of study times for first-year students follow a Normal distribution with a standard deviation σ = 78 minutes. Suppose a sample of 431 students found that the mean study time for these...

The distribution of study times for first-year students follow a Normal distribution with a standard deviation σ = 78 minutes. Suppose a sample of 431 students found that the mean study time for these students was x¯= 195 minutes per week. Use this to find a 95% confidence interval to estimate the mean study time for all students.

We are 95% confident that the mean study time for first-year students is between (Answer)            and minutes ( Answer)           minutes.