An Observational Study Found a Statistically Significant Relationship Between an Explanatory

Multiple Choice

An observational study found a statistically significant relationship between an explanatory variable and a response variable that surprised the researchers. If you wanted to explore possible explanations, which of the following pieces of information would not be useful?

A) How many different relationships were tested in the study and how many were statistically significant.
B) How large the sample size was for the study.
C) Whether it was a case-control study or not.
D) A confidence interval for the relative risk.