Explain the purpose of applying multiple regression analysis. Following table shows the scores (Y) made by ten assemblies –line employees on a test design to measure the job satisfaction. It also…

Explain the purpose of applying multiple regression analysis. Following table shows the scores (Y) made by ten assemblies –line employees on a test design to measure the job satisfaction. It also shows the scores made on an aptitude test (X1​) and number of days absent (X2​) during the past year (excluding vacation).

Y
64
70
85
50
60
72
75
55
80
70
X1​
6
6
9
5
6
7
8
6
8
6
X2​
2
1
0
8
2
1
5
9
1
1

• i) Find the multiple regression equation for the sample data.
• ii) Interpret the value of regression coefficients b₁ and b₂.
• iii) Estimate the score of an employee whose aptitude test score is 9 and number of absent days are 6.