condition mean min max ZT0-3 0.03743818175 0.0 0.0748763635 ZT4-7 1.3217656024999997 0.5887199765 2.0548112284999998 ZT8-11 6.4080309545 3.745795156 9.070266753 ZT12-15 11.51831793025 8.8903500405 14.14628582 ZT16-19 30.82731019 24.11678547 37.53783491 ZT20-23 41.288667274999995 39.88715566 42.69017889