Questions with Complete Solutions - Hamro CSIT

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 () and number of days absent ( $X_{2}$ ) during the past year (excluding vacation).

64 70 85 50 60 72 75 55 80 70

6 6 9 5 6 7 8 6 8 6

$X_{2}$ 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.

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