researchers are concerned about the impact of students working while they are enrolled in classes, and they would like to know if students work too muc and therefore are spending less time on their...

researchers are concerned about the impact of students working while they are enrolled in classes, and they would like to know if students work too muc and therefore are spending less time on their classes than they should be. first the researchers need to find out, on average , how many hours a week students are working. A survey of 50 students provides a sample mean of 7.1 hours work with the standard deviation of 5 hours. what is a 95% confidence interval based on this sample? The 95 % confidence interval for the number of hours worked from _________hours to _________hours.