condition mean min max ZT0-3 0.19961038175 0.0808664725 0.318354291 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.196150329 0.18327700600000002 0.209023652 ZT16-19 0.8612461419999999 0.7999487019999999 0.9225435819999999 ZT20-23 0.50908996875 0.34324934450000005 0.674930593