Effect of Glass Thickness on Performance of Flat Plate Solar Collectors for Fruits Drying

Table 2

Statistical analysis of performance of solar collectors with different glass thicknesses by using SPSS program.

Glass	𝑁	Mean	Standard deviation	Standard error	95% confidence interval for mean		Minimum	Maximum
					Lower bound	Upper bound
Glass, 3 mm	5	32.7400	3.63015	1.62345	28.2326	37.2474	26.50	35.80
Glass, 4 mm	5	35.4000	4.07001	1.82016	30.3464	40.4536	28.50	38.60
Glass, 5 mm	5	30.4400	2.40583	1.07592	27.4528	33.4272	27.30	33.70
Glass, 6 mm	5	27.8000	2.43002	1.08674	24.7827	30.8173	24.40	31.20
Total	20	31.5950	4.12546	0.92248	29.6642	33.5258	24.40	38.60
Model
Fixed effects			3.21854	0.71969	30.0693	33.1207
Random effects				1.62083	26.4368	36.7532