1. Prior to being hired, the ve salespersons for a computer store were given a standard sales aptitude test. For each individual, the score achieved on the aptitude test and the number of computer...

1. Prior to being hired, the ve salespersons for a computer store were given a standard sales aptitude

test. For each individual, the score achieved on the aptitude test and the number of computer systems sold during the first 3 months of their employment are shown in the attached image.

(a) Determine the least-squares regression line and interpret its slope.

(b) Estimate, for a new employee who scores 60 on the sales aptitude test, the number of units the new employee will sell in her first 3 months with the company.

(c) Find the standard error of estimate.

(d) Find the r-square of the model.

Extracted text: John Cora Sam Cindy Henry Score on aptitude test 80 70 45 90 20 Units sold in 3 months 25 15 10 40 5