condition mean min max ZT0-3 15.25245 15.25245 15.25245 ZT4-7 11.753250000000001 11.753250000000001 11.753250000000001 ZT8-11 10.5793 10.5793 10.5793 ZT12-15 13.7014 13.7014 13.7014 ZT16-19 15.4741 15.4741 15.4741 ZT20-23 14.88185 14.88185 14.88185