condition mean min max ZT0-3 128.047777425 119.0012279 137.09432694999998 ZT4-7 108.74864225 107.93482576 109.56245874000001 ZT8-11 110.23382757333333 107.38692258 113.08073256666665 ZT12-15 92.29882716 80.78852893333334 103.80912538666666 ZT16-19 73.311331505 72.69711309 73.92554992000001 ZT20-23 71.93024637333335 70.99391089333334 72.86658185333334