condition mean min max ZT0-3 24.962649999999996 22.86225 27.063049999999997 ZT4-7 17.69695 17.69695 17.69695 ZT8-11 8.22517 8.22517 8.22517 ZT12-15 0 0 0 ZT16-19 17.07535 17.07535 17.07535 ZT20-23 17.7714 17.7714 17.7714