For testing the difference between two sample means,the level of measurement is assumed to be
A)nominal.
B)ordinal.
C)interval-ratio.
D)any of the above

Question

Quizplus · Accepted Answer

The level of measurement needed for testing the difference between two sample means is interval-ratio. This is because we need to be able to measure and compare the numerical values of the variables being considered. Nominal and ordinal data cannot be used for testing the difference between means because they do not have meaningful numerical values. Therefore, the best choice is C - interval-ratio.

For Testing the Difference Between Two Sample Means,the Level of Measurement