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question
janice is investigating if time spent studying has any effect on test grades. what is the explanatory variable?
select the correct answer below:
○ time spent studying
○ test grades
○ the number of people that are being studied
○ none of the above

Explanation:

An explanatory variable is the variable that is hypothesized to cause a change in another variable. In this investigation, Janice is looking at how time spent studying impacts test grades, so time spent studying is the variable used to explain changes in test grades.

Answer:

time spent studying