condition mean min max ZT0-3 22.009099999999997 21.2413 22.776899999999998 ZT4-7 16.2142 16.2142 16.2142 ZT8-11 6.74247 6.74247 6.74247 ZT12-15 0 0 0 ZT16-19 12.64229 12.64229 12.64229 ZT20-23 25.1941 25.1941 25.1941