The Nelson Corporation decides to develop a multiple regression equation to forecast sales performance. A random sample
Question:
The quantities in parentheses are the standard errors of the partial regression coefficients. The standard error of the estimate is 3.56. The standard deviation of the sales variable is sy = 16.57. The variables are
Y = the sales performance, in thousands
X1 = the aptitude test score
X2 = the effort index
a. Are the partial regression coefficients significantly different from zero at the .01 significance level?
b. Interpret the partial regression coefficient for the effort index.
c. Forecast the sales performance for a salesperson who has an aptitude test score of 75 and an effort index of .5.
d. Calculate the sum of squared residuals, ˆ‘(Y - )2.
e. Calculate the total sum of squares, ˆ‘(Y - )2.
f. Calculate R2, and interpret this number in terms of this problem.
g. Calculate the adjusted coefficient of determination, 2.
A Corporation is a legal form of business that is separate from its owner. In other words, a corporation is a business or organization formed by a group of people, and its right and liabilities separate from those of the individuals involved. It may...
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