A medical researcher conducts an observational study to assess the association between physical activity and diabetes mellitus. For this study the researcher recruited 160 individuals with a good...

A medical researcher conducts an observational study to assess the association between physical activity and diabetes mellitus. For this study the researcher recruited 160 individuals with a good physical activity take part in an observational study and found that 95 of the individuals with a good physical activity and 115 of the individuals with a poor physical activity were seento have diabetes (assume the populations are approximately normally distributed). Based on this information answer questions “a” , “b” and “c”