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

Table 5

Multiple comparisons test for collector mean efficiencies.

(I) Glass	(J) Glass	Mean difference (I − J)	Standard error	Significance	95% confidence interval
					Lower bound	Upper bound
Glass, 3 mm	Glass, 4 mm	−2.66000	2.03558	0.572	−8.4838	3.1638
	Glass, 5 mm	2.30000	2.03558	0.677	−3.5238	8.1238
	Glass, 6 mm	4.94000	2.03558	0.112	−0.8838	10.7638
Glass, 4 mm	Glass, 3 mm	2.66000	2.03558	0.572	−3.1638	8.4838
	Glass, 5 mm	4.96000	2.03558	0.110	−0.8638	10.7838
	Glass,6 mm	7.60000*	2.03558	0.009	1.7762	13.4238
Glass, 5 mm	Glass,3 mm	−2.30000	2.03558	0.677	−8.1238	3.5238
	Glass,4 mm	−4.96000	2.03558	0.110	−10.7838	0.8638
	Glass, 6 mm	2.64000	2.03558	0.578	−3.1838	8.4638
Glass, 6 mm	Glass, 3 mm	−4.94000	2.03558	0.112	−10.7638	0.8838
	Glass, 4 mm	−7.60000*	2.03558	0.009	−13.4238	−1.7762
	Glass, 5 mm	−2.64000	2.03558	0.578	−8.4638	3.1838

∗The mean difference is significant at the 0.05 level.