A class instructor is trying to determine following data related from the 7 stud

Question

A class instructor is trying to determine following data related from the 7 students whe ther the grade assigned for chemistry is a function of the Test Score and classes missed. He gathered the Student Chemistry Inteligence Classes Grade, y Test Score Missed, 74 M90 65 65 Using Excel, the instructor derived the following Matrix which is equivalent to: (xx'x 3.797468 1.196203 2.063291 0.04684 -0.02025 0.02911 0.21835 0.047468 0.04114 85 q the data, fit the multiple linear regression of the form Y-bo + b1X1+b2X2 Estimate he chemistry grade for a student who has an intelligence test score of and has missed 3 classes.

Explanation / Answer

Here dependent variable is Chemistry grade and there are two independent variables intelligence test score and classes missed.

We have to fit multiple regression here.

We can fit multiple regression in MINITAB.

steps :

ENTER data into MINITAB sheet --> STAT --> Regression --> Regression --> Response : y --> Predictors : x1 and x2 --> Results : select second option --> ok --> ok

The regression equation is
y = 51.7 + 0.581 x1 - 0.69 x2

Now we have to find y when x1 = 60 and x2 = 3

y = 51.7 + 0.581*60 - 0.69*3 = 84.49

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