Regression problems



Regression problems

4-13 Students in a management science class have just received their grades on the first test. The instructor has provided information about the first test grades in some previous classes as well as the final average for the same students. Some of these grades have been sampled and are as follows

STUDENT

1

2

3

4

5

6

7

8

9

1st test grade

98

77

88

80

96

61

66

95

69

Final average

93

78

84

73

84

64

64

95

76

Solution

The regression model that could be used to predict the final average in the course based on the first test grade is shown in the following graph:

b) Final Grade = 0.739(83) + 18.98 = 80.317 ~ 80 Grade points

c) The obtained value ...