We would like to know the average amount of time students sp

We would like to know the average amount of time students spend studying for their classes each week. A random sample of 144 students are surveyed. They reported spending an average of 7.6 hours studying, with s = 1.2 hours. Based on these data, find a 95% confidence interval for the average amount of time a student studies for classes each week. If you wanted to be 99.7% confident, using the same data, would your margin of error be bigger or smaller. Why?

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