condition mean min max ZT0-3 68.519725 62.72405 74.3154 ZT4-7 41.9552 41.9552 41.9552 ZT8-11 87.47725 87.47725 87.47725 ZT12-15 0 0 0 ZT16-19 112.0105 112.0105 112.0105 ZT20-23 82.72655 82.72655 82.72655