Question

. Estimate the regression equation by using the following data. Also forecast the Sales for 2100...

. Estimate the regression equation by using the following data. Also forecast the Sales for 2100 employees.

Employees

(No.)

Sales

(millions)

1995

145

2125

136

2136

131

2165

165

2239

139

2143

157

2235

164

2500

?

(a) Develop a scatter diagram.

(b) Determine the correlation coefficient.

(c) Determine the coefficient of determination R2.

(d) Estimate the regression coefficients α and β of the equation Y= α + β X + e?

(e) Forecast the annual gross sales for 2100 employees.

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