For an independent-samples t test, the grouping variable (the variable whose attributes are used to identify the two groups to be compared) can be what level of measurement?
A) only interval/ratio
B) either interval/ratio or ordinal
C) interval/ratio, ordinal, or nominal

Question

Quizplus · Accepted Answer

The independent-samples t test can be used to compare two groups identified by a grouping variable that can be either interval/ratio, ordinal, or nominal. Therefore, all three options are valid choices for the level of measurement of the grouping variable.

For an Independent-Samples T Test, the Grouping Variable (The Variable