condition mean min max ZT0-3 150.73783333333333 125.2405 178.17 ZT4-7 165.87099999999998 165.87099999999998 165.87099999999998 ZT8-11 150.756 150.756 150.756 ZT12-15 161.89525 150.5315 173.25900000000001 ZT16-19 116.65925 116.65925 116.65925 ZT20-23 123.1443 123.1443 123.1443