A student wonders if the number of hours a student studies for an exam is related to the score the student gets on the exam. She surveyed her classmates and made these observations.

The number of hours of study (x) 6,8, 10, 12, 15

The score obtained out of 100 (y) 70, 76,68 80, 95

(a)Find the correlation r between the number of hours of study and the score obtained.

(b)Find the critical values for r

(c)Determine if there is significant linear correlation in the population.

(d)Clearly state the conclusion.