Understanding Experiments with Two Groups - Answer Key
Twenty Sets $1 =$

question 94

Short Answer

Understanding Experiments with Two Groups - Answer Key
Twenty sets of depressed twins are obtained for a study on the effects of a new antidepressant. In each twin set, one twin is assigned to receive the drug, and the other is designed to receive the placebo. Three months later, depression levels are measured on a scale from 1 (not at all depressed) to 7 (very depressed). The following data was obtained:
GROUP $1 =$ Received drug
GROUP $2 =$ Received placebo
Variable $=$ Depression level
$\begin{array} { l l l l } \text { GROUP } & N & \text { Mean } & S D \\ \text { GROUP 1 } & 10 & 3.21 & 1.035 \\ \text { GROUP 2 } & 10 & 5.77 & 1.772 \\ t = 5.785 & d f = 9 & p = 0.017 & \text { Cohen's } d = .88 \end{array}$
-What is the independent variable?

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Definitions:

Standard Costing Systems

A cost accounting system that estimates the cost of products or services by assigning expected costs for materials, labor, and overhead to the actual production volumes.

Variances

The difference between expected and actual performance, costs, or revenues, often analyzed in budgeting and accounting to manage and improve financial performance.

Direct Labour Costs

Expenses associated with the labor directly involved in the production of goods or services.

Sales Price Variance

The difference between the actual sales revenues received and the expected revenues at standard selling prices.