On a Reading Comprehension Exam,the Proportion of Examinees in the Top

question 11

Multiple Choice

On a reading comprehension exam,the proportion of examinees in the top group that answered item 5 correctly equaled 0.70 and the proportion of examinees in the bottom group that answered item 5 correctly equaled 0.10.What is the discrimination index for item 5?

• A)0.36
• B)0.49
• C)0.60
• D)0.80

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Definitions:

ANOVA Table

A table used to summarize the results and components of variance from an Analysis of Variance statistical test.

Additive

A method or model where the effects are simply added together to predict the outcome.

Components

Basic elements or parts that make up a system or compound.

Standard Deviation

A measure of the dispersion or variability of a set of values, indicating how much from the average (mean) individual values typically differ.