condition mean min max ZT0-3 22.841633333333334 22.841633333333334 22.841633333333334 ZT4-7 17.284399999999998 17.284399999999998 17.284399999999998 ZT8-11 10.36625 10.36625 10.36625 ZT12-15 16.5744 16.5744 16.5744 ZT16-19 41.944 41.944 41.944 ZT20-23 34.3297 34.3297 34.3297