Use the result from part$($a$)$ to compare the two data sets.

A$.$

The number of acute postoperative days$$ is$,$ on$$ average, less with the static system than with the dynamic system.$$ However, the static system produces more variation in the number of days.

B$.$

The number of acute postoperative days$$ is$,$ on$$ average, less with the dynamic system than with the static system.$$ Also, the static system produces more variation in the number of days.

C$.$

The number of acute postoperative days$$ is$,$ on$$ average, less with the dynamic system than with the static system.$$ However, the dynamic system produces more variation in the number of days.

D$.$

The number of acute postoperative days$$ is$,$ on$$ average, less with the static system than with the dynamic system.$$ Also, the dynamic system produces more variation in the number of d