Question: A professor for a large class is worried that his students spend too little time studying. At the 98% confidence level, the professor needs to

A professor for a large class is worried that his students spend too little time studying. At the 98% confidence level, the professor needs to determine the sample size needed for a study that he will conduct on the average number of hours students study weekly for his entire class. From data he accumulated over the years, the population standard deviation number of hours is 3.9 hours. The margin of error will be 2 hours from the true average

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