condition mean min max ZT0-3 0.15572953333333334 0.04374145 0.24025415 ZT4-7 0.217519 0.217519 0.217519 ZT8-11 0.31552749999999996 0.31552749999999996 0.31552749999999996 ZT12-15 0.882905 0.8826925000000001 0.8831175 ZT16-19 0.986028 0.986028 0.986028 ZT20-23 0.7696495000000001 0.7696495000000001 0.7696495000000001