condition mean min max ZT0-3 24.801475 21.719450000000002 27.883499999999998 ZT4-7 26.3557 26.3557 26.3557 ZT8-11 33.390249999999995 33.390249999999995 33.390249999999995 ZT12-15 0 0 0 ZT16-19 45.9454 45.9454 45.9454 ZT20-23 32.64375 32.64375 32.64375