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As an aid for improving students' study habit, nine students were randomly selected to attend a seminar on the importance of education in life. The table shows the number of hours each student studied per week before and after the seminar.

Before 9 12 6 15 3 18 10 13 7
After 9 17 9 20 2 21 15 22 6

At, did attending the seminar increase the number of hours the students studied per week?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9372734

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