Toronto Company Makes Cell Phones $\begin{array}{ll}\text { Intercept } & 2,225 \\\text { X Variable 1 } & 9.75\end{array}$

question 109

Multiple Choice

Toronto Company makes cell phones. The company controller wanted to calculate the fixed and variable costs associated with electricity use in the factory. Data for the past four months were collected.Coefficients shown by a regression program are:
$\begin{array}{lrr}& \text { Electricity } & \text { Machine } \\\text { Month } & \text { cost } & \text { hours }\\\text { May } & \$ 7,560 & 570 \\\text { June } & 8,220 & 625 \\\text { July } & 7,480 & 546 \\\text { August } & 7,186 & 518\end{array}$ $\begin{array}{ll}\text { Intercept } & 2,225 \\\text { X Variable 1 } & 9.75\end{array}$
-Refer to the Figure.What is the variable rate of the electricity cost when using the results of regression?

• A)$9.67 per machine hour
• B)$9.75 per machine hour
• C)$10.25 per machine hour
• D)$13.87 per machine hour

---

Definitions:

Single-Subject Experimental Designs

Research designs that focus on the response of a single participant to document the effects of a variable.

Cross-Sectional

Describes research that collects data from a population or a representative subset at one specific point in time.

Dependent Variable

In an experiment or study, it is the variable being tested and measured, which is expected to be influenced by the independent variable.

Single-Subject Experimental Design

A research design focusing on the effects of an intervention on a single participant, allowing detailed observation of individual responses.