Item Response Theory (IRT)focuses on the

question 112

Multiple Choice

Item response theory (IRT) focuses on the

• A) circumstances that inspired the development of the test.
• B) test administration variables.
• C) individual items of a test.
• D) "how and why" of the Interborough Rapid Transit line.

---

Definitions:

Categories

Distinct groups or classes into which data can be classified.

Expected Frequency

The number of times an event is predicted to occur within a specified number of trials or over a given period of time, based on probability.

Observed Frequency

The count of occurrences or instances of a particular event or characteristic in a data set.

Chi-squared Distribution

A distribution used in statistics to test hypotheses about the frequency distribution of observed data compared to the expected distribution if the null hypothesis is true.