condition mean min max ZT0-3 19.939642182500002 17.14626299 22.733021375 ZT4-7 31.083039475 27.076723610000002 35.08935534 ZT8-11 64.8263754325 49.38271101 80.27003985500001 ZT12-15 73.28826807749999 59.401696994999995 87.17483916 ZT16-19 46.0365028225 43.91639775 48.156607895 ZT20-23 42.375466242499996 41.237356935 43.51357555