condition mean min max ZT0-3 36.158433333333335 34.5315 37.1132 ZT4-7 27.6418 27.6418 27.6418 ZT8-11 14.94 14.94 14.94 ZT12-15 13.807500000000001 13.0256 14.589400000000001 ZT16-19 15.45385 15.45385 15.45385 ZT20-23 23.419600000000003 23.419600000000003 23.419600000000003