condition mean min max ZT0-3 4873.700000000001 4873.700000000001 4873.700000000001 ZT4-7 4105.9 4105.9 4105.9 ZT8-11 3698.8999999999996 3698.8999999999996 3698.8999999999996 ZT12-15 3793.5 3793.5 3793.5 ZT16-19 4562.35 4562.35 4562.35 ZT20-23 4925.15 4925.15 4925.15