Analysis of results of signal strength in the reflective path

Analysis of results of signal strength in the reflective path

To compare reflection in various roofing materials, data analysis was conducted using MS Excel data analysis tool kit. The test statistic applied was t-test at 0.05 level of significance. The results from the test statistics were captured and recorded as in appendix A. Whereas iron and clay exhibited different signal reflection means, the test statistics showed that there was no significant difference between them and the two roofing materials showed the lowest reflection effects. Aluminum and plastic exhibited medium signal reflection means and the test statistics showed that they have no significant difference. Steel and Decra roofing materials exhibited the highest reflection in that order. 

	Reflected Received Signal Strength RSS (dBmV/M)
Materials	Mean	Max (90)	Min (135)
Decra	73.01	80.52	69.32
Steel	73.03	86.54	65.82
Aluminum	69.65	83.02	52.42
Plastic	64.75	68.48	60.52
Clay	62.01	77.00	29.04
Iron	61.35	75.84	41.08

The highest and lowest mean reflection occurred at angles of incidence of 90 and 135 degrees respectively. The interactive tests showed that the lowest reflected signal strength (29dBmV/M) occurred on clay material at an angle of 135 degrees while the highest (86dBmV/M) occurred on steel at 90 degrees. See appendix A for statistical analysis. Generally the reflected received signal ratio increased as angle of incidence varied from 0 degrees to 90 degrees across all materials.