The "20" and "21" in KR-20 and KR-21 represent
A) numbers held constant in the denominator.
B) numbers held constant in the numerator.
C) the order in which the formulas were created.
D) the age of Fred Kuder's son and nephew at the time the formulas were developed.

Question

Quizplus · Accepted Answer

The "20" and "21" in KR-20 and KR-21 refer to the order in which the formulas were developed by Kuder and Richardson.

The "20" and "21" in KR-20 and KR-21 Represent