condition mean min max ZT0-3 1.4004202499999998 0.9659555 1.8348849999999999 ZT4-7 1.47446 1.47446 1.47446 ZT8-11 0.241872 0.241872 0.241872 ZT12-15 0 0 0 ZT16-19 0.2405815 0.2405815 0.2405815 ZT20-23 1.3303699999999998 1.3303699999999998 1.3303699999999998