Question 1
Identify the variable of interest in the study.
An analysis of 10 individual studies attempted to determine if there is a conclusive link between "the Pill" and ovarian cancer.
◦ The number of studies performed
◦ Whether the subject developed ovarian cancer
◦ The effect of a placebo on the subject's illness
Question 2
Identify the variable of interest in the study.
Researchers at a university lab found that a genetically modified insect frog a toxin through its skin.
◦ The measured amount of toxin that is released through the frog's skin
◦ Whether the frog also releases water through its skin
◦ The measured thickness of the frog's skin