Posted by **mom** on Thursday, October 4, 2012 at 11:05am.

You are given the following data.

Number of Absences Final

Grade

0 95

1 91

2 82

3 69

4 67

5 58

- Find the correlation coefficient for the data.

- Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.

- statistics -
**MathGuru**, Thursday, October 4, 2012 at 9:02pm
Using an online calculator, I have the following:

6 data pairs (x,y):

( 0.00 , 95.0 ); ( 1.00 , 91.0 ); ( 2.00 , 82.0 ); ( 3.00 , 69.0 ); ( 4.00 , 67.0 ); ( 5.00 , 58.0 );

r = -0.987 -->correlation coefficient

predicted y = 96.3 - 7.71x -->regression equation

To find the final grade of a student who misses 3.5 days, substitute that value for x and solve for predicted y.

I hope this will help.

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