condition mean min max ZT0-3 0.8808676666666666 0.8153195 0.94081 ZT4-7 0.959187 0.959187 0.959187 ZT8-11 0.485961 0.485961 0.485961 ZT12-15 0.4902565 0.42948 0.551033 ZT16-19 0.781345 0.781345 0.781345 ZT20-23 0.811687 0.811687 0.811687