condition mean min max ZT0-3 0.3753645135 0.291177705 0.459551322 ZT4-7 1.8078820414999999 0.4885777675 3.1271863155 ZT8-11 29.576492406 19.738750982000003 39.41423383 ZT12-15 34.015803415 29.56685094 38.46475589 ZT16-19 15.47754701475 12.3280728895 18.62702114 ZT20-23 5.85070178825 4.8405105975 6.860892979000001