The One-Parameter IRT Model Assumes That Items Only Differ In

question 30

Multiple Choice

The one-parameter IRT model assumes that items only differ in:

• A)the chance of a random correct answer.
• B)difficulty.
• C)discrimination.
• D)scree point.

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Definitions:

Student t Distribution

A probability distribution used in statistics when estimating the mean of a normally distributed population in situations where the sample size is small and population standard deviation is unknown.

Parameter v

This seems to be a typographical error or a non-standard term. If "Parameter" was intended, it refers to a value that characterizes a population in statistics. NO.

Mean E(t)

The expected value of a random variable at time t, reflecting the average outcome if an experiment were repeated many times.

Degrees of Freedom

The number of independent values in a statistical calculation that are free to vary.