condition mean min max ZT0-3 6.738999999999999 6.663259999999999 6.81474 ZT4-7 5.211550000000001 5.211550000000001 5.211550000000001 ZT8-11 5.69111 5.69111 5.69111 ZT12-15 0 0 0 ZT16-19 6.475705 6.475705 6.475705 ZT20-23 7.203519999999999 7.203519999999999 7.203519999999999