Suppose I recorded tha attendance of my students in arecent statistics class because I wanted to investigate the linear relationship between the number of classes they missed and their final grades. The following table shows these data for a random sample of nine students. Use formulas on pages 649, 652, 657, 658, and 659.

missed classes final grade

4 74

6 79

1 93

4 70

0 96

2 84

0 90

5 86

2 95

a) Calculate the slope and the y-intercept for the regression formula.

b) Provide an interpretation for the value of the slope.

c) Predict the final grade for a student who missed five classes.

d) Calculate the SST

e) Partition the SST into the SSR and SSE.

f) Verify your results using Excel