An HR Manager Was Interested in Employee Use of Company

Multiple Choice

An HR manager was interested in employee use of company on-site gyms across twenty sites. Different researchers collected and analysed data across each of the sites but the resultant twenty reports showed differing p-values, some sites found a statistical significance between opening hours of on-site gyms and employee usage and others did not. Which of the following would it useful for her to review?

A) Levels of missing data
B) Outliers
C) Confidence intervals
D) The Null Hypotheses