A professor at a local community college is interested in studying the amount of hours that a college student works per week. If the professor would like to construct a 99% confidence interval for the...

Extracted text: A professor at a local community college is interested in studying the amount of hours that a college student works per week. If the professor would like to construct a 99% confidence interval for the mean hours worked per week by college students within 1.4 hours, what sample size would the professor need? A previous study found that the standard deviation for the amount of hours students work per week was 3.19 hours.