condition mean min max ZT0-3 0.293881374 0.11479121099999999 0.472971537 ZT4-7 5.52029569975 1.7269905325000001 9.313600867 ZT8-11 26.495636420000004 19.81512906 33.176143780000004 ZT12-15 31.0314080575 30.358796175 31.70401994 ZT16-19 13.66415405 12.77959197 14.548716129999999 ZT20-23 26.0843645675 19.82346492 32.345264215