condition mean min max ZT0-3 23.273200000000003 23.273200000000003 23.273200000000003 ZT4-7 25.77245 25.77245 25.77245 ZT8-11 24.75405 24.75405 24.75405 ZT12-15 19.025199999999998 19.025199999999998 19.025199999999998 ZT16-19 16.46275 16.46275 16.46275 ZT20-23 15.655100000000001 15.655100000000001 15.655100000000001