Professor Plum Created Class Intervals from the Test Scores for His

question 76

Multiple Choice

Professor Plum created class intervals from the test scores for his class. He made a line graph using these intervals on the X-axis and the proportion of students who answered a particular question correctly on the Y-axis. The result is

• A)a discrimination index.
• B)a correlation index.
• C)an item characteristic curve.
• D)a histogram.