A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with a mean of 25 and a standard deviation of 7. Find the 25th percentile of the numbers of hours studying. Between what two values ore the middle 80% of the hours spent studying? What is the cutoff for the top 25% of study hours?

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A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with a mean of 25 and a standard deviation of 7.

Find the 25th percentile of the numbers of hours studying.

Between what two values ore the middle 80% of the hours spent studying?

What is the cutoff for the top 25% of study hours?

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