The McGraw Company Is Accumulating Data to Be Used in Preparing

question 49

Multiple Choice

The McGraw 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: (CMA adapted) $$\begin{array} { l r c } & \begin{array} { c } \text { Hours of } \\\text { Activity }\end{array} & \begin{array} { c } \text { Maintenance } \\\text { Costs }\end{array} \\\text { January } & 480 & \$ 4,200 \\\text { February } & 320 & 3,000 \\ \text { March } & 400 & 3,600 \\\text { April }& 300 & 2,820 \\\text { May } & 500 & 4,350 \\\text { June }& 310 & 2,960 \\\text { July } & 320 & 3,030 \\\text { August } & 520 & 4,470 \\\text { September } & 490 & 4,260 \\\text { October } & 470 & 4,050 \\\text { November } & 350 & 3,300 \\\text { December }& 340 & 3,160 \\ \text { Sum } & 4,800 & \$ 3,200 \\ \text { Average }& 400 & 3,600 \\\text { A coefficient } & & 684.65 \\\text { B coefficient } & & 7.2884 \\\text { Standard error of the a coefficient } & 49.515 & \\\text { Standard error of the b coefficient } & 0.12126 & \\\text { Standard error of the estimate } & & 34.469 \\\mathrm { R } ^ { 2 } & & 0.99724 \\\text { T-value a } & & 13.827 \\\text { T-value b } & & 60.105\end{array}$$
- What would be the cost equation if the high-low method is used?

• A) Maintenance Costs = $9.00 × Hours of Activity.
• B) Maintenance Costs = 3,600 + (400 × Hours of Activity).
• C) Maintenance Costs = $570 + ($7.50 × Hours of Activity).
• D) Maintenance Costs = $34.469 + ($0.99724 × Hours of Activity).

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Definitions:

Pivoting

The action of rotating around a single point or axis, often used to describe movements in sports, dance, or mechanics.

Thoracic Cage

The bony framework of the chest, consisting of the ribs, sternum, and part of the spinal column, protecting vital organs and supporting respiration.

Axial Skeleton

The segment of the skeletal system that is made up of the head and trunk bones, encompassing the skull, spine, ribs, and sternum.

Vertebral Column

A series of connected bones called vertebrae that form the backbone, providing support and protecting the spinal cord.