condition mean min max ZT0-3 8.367352499999999 7.828469999999999 8.906234999999999 ZT4-7 5.237814999999999 5.237814999999999 5.237814999999999 ZT8-11 4.038825 4.038825 4.038825 ZT12-15 0 0 0 ZT16-19 6.49167 6.49167 6.49167 ZT20-23 7.033795 7.033795 7.033795