Nutritional benefits of green tea

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A hypothetical experiment is conducted whose purpose is to determine whether the nutritional benefits of green tea can have a beneficial effect on the exam performance of Stat 001 students.Reference: Ref 5-12

In the spring term, Stat 001 lectures will be given at 10:30 A.M. rather than at 8:30 A.M. The time of lecture (8:30 or 10:30) is

A. the response variable.

B. a lurking variable.

C. a stratum.

D. an explanatory variable

Reference no: EM131828431

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