condition mean min max ZT0-3 14.8027 14.6323 14.973099999999999 ZT4-7 11.98225 11.98225 11.98225 ZT8-11 13.27095 13.27095 13.27095 ZT12-15 0 0 0 ZT16-19 15.28095 15.28095 15.28095 ZT20-23 15.42595 15.42595 15.42595