Posted by **Lucy** on Tuesday, November 22, 2011 at 2:48pm.

4) The table below shows the study times and test scores for a number of students.

Study Time (minutes) (x) 9 16 21 26 33

Test Score (y) 59 61 64 65 73

a)What line best relates study time to the test score?

b)Calculate r and r^2.

c)Determine whether r is statistically significant using a 5% significance level.

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