1.2 Researchers are concerned about the impact of students working while they are enrolled in classes. They would like to know whether students work too much and are therefore spending less time on their classes than they should be. First, the researchers need to find out, on average, how many hours students are working per week. They know from previous studies that the standard deviation of this variable is about 5 hours. A survey of 200 students provides a sample mean of 7.10 hours worked. What is a 95% confidence interval and give a management interpretation based on this sample? (Round off your answer to two (2) decimal places) (8)