The following data represent the chemistry grades for a random sample of 12 freshmen at a certain college along with their scores on an intelligence test administered while they were still seniors in high school. Also given the number of class periods missed by 12 students taking the chemistry course. The complete data are shown

Student

1

2

3

4

5

6

7

8

9

10

11

12

Chemistry grade (y)

85

74

76

90

85

87

94

98

81

91

76

74

Test scores (x1)

65

50

55

65

55

70

65

70

55

70

50

55

Classes missed (x2)

1

7

5

2

6

3

2

5

4

3

1

4

a.Fit a multiple regression equation.

b.Estimate the chemistry grade for a student who has an intelligence test score of 64 and missed 4 classes.

c.Perform analysis of variance.

d.Calculate multiple correlation.