4 Researchers are concerned about the impact of students wor

(4) Researchers are concerned about the impact of students working while they are enrolled in classes, and they\'d like to know if students work too much 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 random sample of 200 students resulted in a sample mean of 7.10 hours worked per week. They know from previous studies that the population standard deviation of this variable is about 5 hours.

(4) Researchers are concerned about the impact of students working while they are enrolled in classes, and they\'d like to know if students work too much 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 random sample of 200 students resulted in a sample mean of 7.10 hours worked per week. They know from previous studies that the population standard deviation of this variable is about 5 hours.

(ii) Report the lower bound of the confidence interval, accurate to two decimal places.

(4) Researchers are concerned about the impact of students working while they are enrolled in classes, and they\'d like to know if students work too much 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 random sample of 200 students resulted in a sample mean of 7.10 hours worked per week. They know from previous studies that the population standard deviation of this variable is about 5 hours.

(ii) Report the upper bound of the confidence interval, accurate to two decimal places.

Solution