When using a paired samples test for the difference between two means,________;otherwise,the test would be analyzing differences.
A)the means must be measured independently
B)the variables should not be measured on the same scale
C)the variables must be measured on the same scale
D)the non-variables must be measured on the same scale

Question

Quizplus · Accepted Answer

Paired samples test requires that the variables being compared are measured on the same scale. This is because the difference score between the two measurements for each individual is calculated and these scores are then used to determine whether there is a significant difference between the means. If the variables are not measured on the same scale, the difference scores may not be meaningful and the test would be invalid.

When Using a Paired Samples Test for the Difference Between