condition mean min max ZT0-3 22.2235 22.2235 22.2235 ZT4-7 16.57215 16.57215 16.57215 ZT8-11 20.798450000000003 20.798450000000003 20.798450000000003 ZT12-15 23.42005 23.42005 23.42005 ZT16-19 32.33665 32.33665 32.33665 ZT20-23 21.59375 21.59375 21.59375