Multiple Choice
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.
Correct Answer:
Verified
Correct Answer:
Verified
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