Topic: Variables and investigative questions

Writing a Complete Variable Classification Answer

Defining Variables Precisely With Units

Counting Cases and Variables in a Large Data Set

Distinguishing Population, Sample, and Parameter Questions

Categorical Versus Quantitative Variables

Spotting Numerical Variables That Are Really Categorical

Ordinal Categories and Rating Scales

Matching Variable Type to the Right Graph or Summary

Context-Specific Variables in Health Studies

What Is a Variable in Statistics