condition mean min max ZT0-3 152.51233333333334 146.4015 159.6385 ZT4-7 120.445 120.445 120.445 ZT8-11 121.154 121.154 121.154 ZT12-15 182.46225 179.077 185.84750000000003 ZT16-19 205.4955 205.4955 205.4955 ZT20-23 195.74200000000002 195.74200000000002 195.74200000000002