Determine which evaluation guideline applies best in questioning the results of the described study
-A homeowner put a brand-name fertilizer/weed killer on half of his lawn and a generic fertilizer/weed killer on the other half. After three weeks, the generic side had 1 weed per square meter, the other side 1.7 weeds per square meter. The generic side required two mowings in the 3 weeks, the brand-name side one. The homeowner concluded that the generic was superior to the brand-name.
A) Consider possible confounding variables.
B) Consider the sample.
C) Consider the type of study.
D) Consider the source.

Question

Quizplus · Accepted Answer

The study may have confounding variables, such as differences in sunlight, soil quality, or watering patterns, that could affect the results independently of the fertilizer/weed killer used.

Determine Which Evaluation Guideline Applies Best in Questioning the Results