condition mean min max ZT0-3 32.205018333333335 9.369455 44.13015 ZT4-7 10.54231 10.54231 10.54231 ZT8-11 7.060665 7.060665 7.060665 ZT12-15 11.8610625 10.508225 13.213899999999999 ZT16-19 18.10325 18.10325 18.10325 ZT20-23 40.8371 40.8371 40.8371