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

Table 3

Mean and variance of cockroach tap counts for surveyed floors of four surveyed buildings (72 units).

Floor	Mean	N	Std. deviation	Variance
G	3.4450	4	1.07438	1.154
1	11.8731	25	13.11264	171.941
2	11.4316	29	15.25659	232.763
3	10.1000	10	9.08811	82.594
4	51.5000	4	46.56616	2168.407
Total	13.1823	72	18.52862	343.310