| A | B | C | D | And |
Sample size | 100 | 99 | 98 | 72 | 100 |
Get to the bottom of the grades | 6.00 (2.00 - 10.00) | 5.00 (0.00 - 10.00) | 6.00 (2.00 - 12.00) | 5.50 (1.00 - 10.00) | 6.00 (3.00 - 11.00) |
Measured results | 8.50 (4.00 - 13.00) | 6.00 (2.00 - 12.00) | 10.00 (3.00 - 17.00) | 6.00 (1.00 - 10.75) | 7.00 (3.00 - 15.00) |
With | −6.727 | −5.661 | −5.62 | −1.878 | −5.256 |
P | <0.05 | <0.05 | <0.05 | 0.60 | <0.05 |