Test Developers Have at Their Disposal a Number of Statistical

question 66

Multiple Choice

Test developers have at their disposal a number of statistical tools that may be applied when selecting items for use on a test.In Chapter 8's Meet an Assessment Professional,Dr.Scott Birkeland made reference to two such techniques.One was a measure of item discrimination,and the other was a measure of item

• A) reliability.
• B) utility.
• C) difficulty.
• D) variance.

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Definitions:

Contribution Margin

The selling price per unit, minus the variable cost per unit, indicating how much each unit contributes to covering fixed costs and generating profit.

Break-even Point

A stage where total sales or production volume exactly matches the overall expenses, consequently yielding no financial gain or deficit.

Break-even Point

The financial stage where total costs equal total revenue, meaning the business is neither making a profit nor a loss.

Unit Variable Costs

Costs that vary directly with the production volume, per unit produced.