Question

If you are using SPSS to conduct a two independent samples t-test, examining the impact of your independent variable of "smoking status" (smoker vs. non-smoker) on your dependent variable of "number of cavities reported in a 3 year period", the variable of "smoking status" would be your identified "Grouping Variable" in the Independent Samples T-Test pop up box. Is this true or false?

Answer 1

In this problem, we have given two variables,  "smoking status" and the dependent variable of "number of cavities reported".

Here "smoking status" is indicator variable ( say 1=Smoker, 2= non-smoker)

According to that, I need to split the response variable "number of cavities reported".

so for smokers (Smoking status = 1) we will have a set of data on "number of cavities reported" also for non-smokers (Smoking status = 2) we will have another set of data on "number of cavities reported"

Hence Smoking status act as a grouping variable here. Hence in SPSS, we need to put in a grouping variable.

(TRUE)