condition mean min max ZT0-3 443.79999999999995 443.79999999999995 443.79999999999995 ZT4-7 622.6 622.6 622.6 ZT8-11 439.2 439.2 439.2 ZT12-15 375.0 375.0 375.0 ZT16-19 331.5 331.5 331.5 ZT20-23 330.2 330.2 330.2