condition mean min max ZT0-3 3344.8791787500004 3120.9728865 3568.785471 ZT4-7 2516.4289055 2299.929592 2732.9282190000004 ZT8-11 2283.83685025 2268.918399 2298.7553015000003 ZT12-15 3307.27553075 3099.168896 3515.3821654999997 ZT16-19 4557.6467327499995 4379.590313 4735.7031525 ZT20-23 4264.6729589999995 4163.4793389999995 4365.866579