condition mean min max ZT0-3 283.7 283.7 283.7 ZT4-7 231.6 231.6 231.6 ZT8-11 233.39999999999998 233.39999999999998 233.39999999999998 ZT12-15 255.25 255.25 255.25 ZT16-19 198.95 198.95 198.95 ZT20-23 128.65 128.65 128.65