Generally, if R 1 is greater than R 2 , _________.
A) the equation yields the U value
B) the equation yields the U value
C) the power of the test is necessarily low
D) we must reject

Question

Generally, if R 1 is greater than R 2 , _________.
A) the equation yields the U value 
B) the equation yields the U value 
C) the power of the test is necessarily low 
D) we must reject

Quizplus · Accepted Answer

The equation mentioned is used for calculating the U value in a Mann-Whitney U test which compares two groups of data. The value of U is influenced by the ranks of the observations and the sample sizes of the two groups. If R 1 (the sum of ranks in the first group) is greater than R 2 (the sum of ranks in the second group), it means that the first group has overall higher ranks and is usually associated with higher values in the variable being tested. This affects the U value and indicates a higher probability of the two groups being different.

Generally, If R 1 Is Greater Than R 2