Researchers were interested in determining if individuals who worked nights were more likely to use sick time. They compared work histories of 230 individuals who worked the night shift with 255 individuals who worked the day shift. sample came from work histories of employees. study showed individuals who worked nights were 23% more likely to use sick time. does this study present convincing evidence that individuals who worked nights are more likely to use sick time?
A) Yes, this was a comparative study.

B) Yes, this study employed a matching design.
C) No, the individual

Question

Researchers were interested in determining if individuals who worked nights were more likely to use sick time. They compared work histories of 230 individuals who worked the night shift with 255 individuals who worked the day shift. sample came from work histories of employees. study showed individuals who worked nights were 23% more likely to use sick time. does this study present convincing evidence that individuals who worked nights are more likely to use sick time?
A) Yes, this was a comparative study. 

B) Yes, this study employed a matching design. 
C) No, the individual

anonymous · Answer

A) Yes, this was a comparative study. 
B) Yes, this study employed a matching design. 
C) No, the individuals were not assigned randomly to groups. There might be lurking variables that account for the differences in the two groups.