High bacterial load of indoor air in hospital wards: the case of University of Gondar teaching hospital, Northwest Ethiopia

Table 3 ANOVA test result on mean bacterial concentration difference among different wards

Source of variation	Sum of squares	df	Mean square	F	Sig.
Between groups	2172222.214	13	167094.016	2.796	0.006
Within groups	2510205.500	42	59766.798
Total	4682427.714	55

ISSN: 2049-6958