Info given
We have the record from 40 patients :
15 stayed for 2 days
15 stayed for 3 days
10 stayed for 4 days
Solution
Population: is defined as the entire individuals of interest.
We want to determine the population for this case and the answer would be:
'All the patients who stayed in during the last year'
And the best answer would be:
All in-patients during the last year