Answer and Explanation:
The three possible reasons are as follows:
Variables done under survey:
1. The surgical equipment cost may be change in the case when there is various vendor
2. The type or the method might be different in the case when there is a gap of generation between these two doctors
3, The management may given the various targets via revenue as one could work less in order to compensate
Here the mean variable difference would be tested by two means for each and every case or conduct the ANOVA for 3 variables that delievers the study that should be main and descriptive