condition mean min max ZT0-3 0.617633 0.617633 0.617633 ZT4-7 0.705003 0.705003 0.705003 ZT8-11 0.5744845000000001 0.5744845000000001 0.5744845000000001 ZT12-15 0.9707815 0.9707815 0.9707815 ZT16-19 0.994778 0.994778 0.994778 ZT20-23 0.5292225 0.5292225 0.5292225