condition mean min max ZT0-3 83.86225 83.86225 83.86225 ZT4-7 103.685 103.685 103.685 ZT8-11 65.81495000000001 65.81495000000001 65.81495000000001 ZT12-15 62.34355 62.34355 62.34355 ZT16-19 38.61635 38.61635 38.61635 ZT20-23 51.95245 51.95245 51.95245