This is observation from previous years about the impact ofstudents working while they are enrolled in classes, due tostudents too much work, they are spending less time on theirclasses. First, the observer need to find out, on average, how manyhours a week students are working. They know from previous studiesthat the standard deviation of this variable is about 5 hours. Asurvey of 200 students provides a sample mean of 7.10 hours worked.What is a 95% confidence interval based on this sample?
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