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In a recent survey concerning company sales and net earnings, 15 companies responded with the following...

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Statistics

In a recent survey concerning company sales and net earnings, 15companies responded with the following information.

CompanySales
($ thousands)		Net Earnings
($ thousands)
Runners54.84.1
NorthCo24.00.8
JenStar42.62.2
Text Tech57.64.2
Capital Consultants56.73.6
Financial Services34.91.8
Cantu Excavating49.52.8
Pace Design25.71.0
CanTech Supply21.40.4
Second Time Around Clothing25.30.7
Echo Systems23.1-0.1
Antique Accents51.33.5
Spin Master Toys52.43.7
XYZ Co.37.11.3
Stiller Co.40.92.6




a) Using a statistical computing tool, find theequation of the regression line.
For full marks your answer should be accurate to at least threedecimal places.

Å· = ? + ?x



b) Use the regression line from part a to estimatethe net earnings for a company with sales of $54.8 thousand.
For full marks your answer should be accurate to at least onedecimal place.

Earnings: ?

c)Given the regression equation from part a, which of thefollowing statements is most appropriate regarding company salesand earnings?
Positive sales means positive net earnings for anybusiness.
Sales have no effect on net revenues.
Insufficient sales can lead to net losses for somebusinesses.
After a certain level of sales has been reached, net earningsstop growing entirely.

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