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PLEASE SHOW YOUR WORK The Armer Company is accumulating data to be used in preparing its annual profit plan for the coming year. The cost

PLEASE SHOW YOUR WORK

The Armer Company is accumulating data to be used in preparing its annual profit plan for the coming year. The cost behavior pattern of the maintenance costs must be determined. The accounting staff has suggested that linear regression be employed to derive an equation in the form of y = a + bx for maintenance costs. Data regarding the maintenance hours and costs for last year and the results of the regression analysis are as follows:

Hours of Activity Maintenance Costs
January 530 $ 4,300
February 350 3,500
March 410 3,900
April 310 2,600
May 460 4,370
June 320 3,180
July 300 3,280
August 460 4,680
September 460 4,620
October 500 4,270
November 310 3,300
December 370 3,270
Sum 4,780 45,270
Average 398 3,773

A coefficient 888.14
B coefficient 7.2411
Standard error of the a cofficient 493.814
Standard error of the a cofficient 1.21636
Standard error of the estimate 330.364
R2 0.77992
T-value a 1.799
T-value b 5.953

What would be the cost equation if regression analysis is used?

A. Maintenance Costs = 888.14 + 7.2411

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