condition mean min max ZT0-3 2.1019125 1.8081450000000001 2.39568 ZT4-7 2.23144 2.23144 2.23144 ZT8-11 0.620748 0.620748 0.620748 ZT12-15 0 0 0 ZT16-19 0.6835745 0.6835745 0.6835745 ZT20-23 1.3049849999999998 1.3049849999999998 1.3049849999999998