condition mean min max ZT0-3 223.39999999999998 223.39999999999998 223.39999999999998 ZT4-7 114.4 114.4 114.4 ZT8-11 193.3 193.3 193.3 ZT12-15 225.35 225.35 225.35 ZT16-19 293.85 293.85 293.85 ZT20-23 257.79999999999995 257.79999999999995 257.79999999999995