Research Article
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 | | 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 | | |
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