| C2 | C3 | C4 | C5 | C6 | C7 |
x | 16.63 | 18.52 | 18.47 | 18.48 | 19.03 | 19.69 |
s | 1.88 | 2.07 | 2.17 | 4.93 | 2.19 | 2.19 |
n | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 |