# An educational research group wants to know how many hours college students spend studying outside of...

###### Question:

An educational research group wants to know how many hours college students spend studying outside of class per week. If they survey 100 students and find an average 10.5 hours of studying a week, with a standard deviation of 2.25, find a 98% confidence interval for the true average number of hours spent studying.

10.5±.324

10.5±.225

None of these

10.5±.482

10.5±.524

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