condition mean min max ZT0-3 0.42267225 0.277243 0.5681015 ZT4-7 0.279809 0.279809 0.279809 ZT8-11 0.57778 0.57778 0.57778 ZT12-15 0 0 0 ZT16-19 0.55745 0.55745 0.55745 ZT20-23 0.5613665 0.5613665 0.5613665