condition mean min max ZT0-3 221.5 221.5 221.5 ZT4-7 187.2 187.2 187.2 ZT8-11 149.64999999999998 149.64999999999998 149.64999999999998 ZT12-15 122.05 122.05 122.05 ZT16-19 120.6 120.6 120.6 ZT20-23 128.4 128.4 128.4