condition mean min max ZT0-3 35.051 35.051 35.051 ZT4-7 34.012299999999996 34.012299999999996 34.012299999999996 ZT8-11 24.510550000000002 24.510550000000002 24.510550000000002 ZT12-15 21.0448 21.0448 21.0448 ZT16-19 21.21495 21.21495 21.21495 ZT20-23 28.37075 28.37075 28.37075