condition mean min max ZT0-3 0.33918297525 0.04413414400000001 0.6342318065 ZT4-7 2.8568611422499997 1.8158689049999999 3.8978533795 ZT8-11 9.782092202 7.4970431689999995 12.067141235 ZT12-15 10.474541365 9.2623700695 11.6867126605 ZT16-19 5.5714911185 5.5523362305 5.5906460065 ZT20-23 6.7579213445 6.7145166734999995 6.8013260155