condition mean min max ZT0-3 83.22568333333334 34.4887 180.4015 ZT4-7 61.2336 61.2336 61.2336 ZT8-11 118.65700000000001 118.65700000000001 118.65700000000001 ZT12-15 239.00475 155.697 322.3125 ZT16-19 129.5825 129.5825 129.5825 ZT20-23 77.2476 77.2476 77.2476