Study the following table of population in a district and the average population served per doctor. Calculate the harmonic mean: AREA POPULATION SERVED PER DOCTOR POPULATION NUMBER OF DOCTORS RURAL 1000 50000 50 URBAN 500 50000 100 TOTAL 100000 150
500
567
667
750
Calculation of harmonic mean is as follows: (50000+50000)/(50000/100+50000/50)=667 Ref : Medical biostatistics, 1st edition pg: 118