condition mean min max ZT0-3 9.1065075 8.006165 10.20685 ZT4-7 12.73365 12.73365 12.73365 ZT8-11 12.43815 12.43815 12.43815 ZT12-15 0 0 0 ZT16-19 11.76605 11.76605 11.76605 ZT20-23 14.9164 14.9164 14.9164