Professor Plum created class intervals from the test scores for ...

[ss2343]

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.

Question 2

The first attempt to apply factor analytic techniques to test construction were made by
 
  a. Sam Beck.
 b. R.B. Cattell.
 c. Henry Murray.
  d. J.R. Guilford.

[Missbam101]

Answer to Question 1

c

Answer to Question 2

d

[ss2343]

TYSM

[FergA]

Gracias!