What Is the Approximate Optimal Item Difficulty Index for a Multiple-Choice

question 29

Multiple Choice

What is the approximate optimal Item Difficulty Index for a multiple-choice item with 4 choices?

• A)0.0
• B)0.25
• C)0.50
• D)0.75
• E)1.0

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Definitions:

Fixed-Proportion

A production process in which the inputs are used in fixed ratios, with no substitution possible between them.

Perfect Substitutes

Goods or services that can be used in exactly the same way, where the consumer is indifferent between the two and will choose the cheaper one.

Scale

The size, extent, or level of something, typically used in the context of production or operations to indicate magnitude or capacity.

Returns to Scale

A concept in economics that describes how the output of a firm changes as all its inputs are increased proportionally.