Question: In a service company, we got using an appropriate evaluation test, the level of satisfaction with their work and the number of days of absence

In a service company, we got using an appropriate evaluation test, the level of satisfaction with their work and the number of days of absence during the last year, and this for a random sample of 13 employees.

We want to use linear regression as a statistical tool to predict the number of days of absence according to the level of job satisfaction. Some preliminary calculations lead to the following results:

We want to determine the coefficients of the regression equation

a) Determine the value of the coefficient b.

b) Determine the value of the coefficient bo.

c) What is the regression equation?

d) What is, on average, the number of days of absence for individuals whose level of satisfaction is 70?

e) What percentage of variation in the number of days of absence is explained by knowledge of the level of job satisfaction of individuals?

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