condition mean min max ZT0-3 195.95 195.95 195.95 ZT4-7 258.2 258.2 258.2 ZT8-11 338.6 338.6 338.6 ZT12-15 520.55 520.55 520.55 ZT16-19 575.6500000000001 575.6500000000001 575.6500000000001 ZT20-23 357.55 357.55 357.55