Cockroach Infestation and Factors Affecting the Estimation of Cockroach Population in Urban Communities

Table 2

Mean of cockroach trap counts for four study locations.

Study locations	Number of; surveyed units	Frequency of infested units	Mean of infestation rate (per trap/unit)*	Variance; /mean ratio
Girls’ dormitory	53	72%	15.90	18.75
Boys’ dormitory	72	72%	16.96	34.87
Residential building	25	60%	7.73	7.39
Hospital	101	61%	4.02	1.36

∗For infested units.