Table 1 Data of roughness
Rq values | Common toothpaste | Biorepair | Fluorine500 | Fluorine1400 |
|---|---|---|---|---|
Sample size | 10 | 10 | 10 | 10 |
Lowest value | 162.3410 | 85.3950 | 148.2470 | 106.6610 |
Highest value | 187.5240 | 144.7160 | 194.2820 | 168.5540 |
Arithmetic mean | 175.1830 | 123.4368 | 163.8533 | 144.4307 |
95% CI for the arithmetic mean | 168.7841 to 181.5819 | 108.7276 to 138.1460 | 152.6110 to 175.0956 | 132.3918 to 156.4696 |
Median | 176.8020 | 131.3735 | 160.3755 | 146.0630 |
95% CI for the median | 166.1845 to 183.6649 | 100.4502 to 140.4814 | 150.4373 to 179.1781 | 136.2510 to 156.6117 |
Variance | 80.0134 | 422.7956 | 246.9807 | 283.2233 |
Standard deviation | 8.9450 | 20.5620 | 15.7156 | 16.8292 |
Relative standard deviation | 0.05106 (5.11%) | 0.1666 (16.66%) | 0.09591 (9.59%) | 0.1165 (11.65%) |
Standard error of the mean | 2.8287 | 6.5023 | 4.9697 | 5.3219 |
Coefficient of Skewness | − 0.04060 (0.9511) | − 0.9807 (0.1488) | 1.0164 (0.1352) | − 1.0634 (0.1189) |
Coefficient of Kurtosis | − 1.5119 (0.1600) | − 0.4064 (0.8836) | 0.01875 (0.8299) | 2.3140 (0.1164) |
D’Agostino− Pearson test for normal distribution | Accept normality (0.3719) | Accept normality (0.3488) | Accept normality (0.3202) | Accept normality (0.0864) |