condition mean min max ZT0-3 304.85 304.85 304.85 ZT4-7 630.5 630.5 630.5 ZT8-11 504.79999999999995 504.79999999999995 504.79999999999995 ZT12-15 442.75 442.75 442.75 ZT16-19 231.14999999999998 231.14999999999998 231.14999999999998 ZT20-23 239.64999999999998 239.64999999999998 239.64999999999998