condition mean min max ZT0-3 23.644933333333334 23.644933333333334 23.644933333333334 ZT4-7 14.69525 14.69525 14.69525 ZT8-11 18.6673 18.6673 18.6673 ZT12-15 19.69255 19.69255 19.69255 ZT16-19 29.506600000000002 29.506600000000002 29.506600000000002 ZT20-23 21.064899999999998 21.064899999999998 21.064899999999998