condition mean min max ZT0-3 968.0999999999999 968.0999999999999 968.0999999999999 ZT4-7 1102.2 1102.2 1102.2 ZT8-11 1139.3000000000002 1139.3000000000002 1139.3000000000002 ZT12-15 624.65 624.65 624.65 ZT16-19 955.15 955.15 955.15 ZT20-23 1518.95 1518.95 1518.95