condition mean min max ZT0-3 7.706075 7.706075 7.706075 ZT4-7 4.96098 4.96098 4.96098 ZT8-11 8.369430000000001 8.369430000000001 8.369430000000001 ZT12-15 9.71909 9.71909 9.71909 ZT16-19 9.734245000000001 9.734245000000001 9.734245000000001 ZT20-23 7.55003 7.55003 7.55003