condition mean min max ZT0-3 9.844719999999999 6.32379 13.365649999999999 ZT4-7 4.6593 4.6593 4.6593 ZT8-11 4.0764499999999995 4.0764499999999995 4.0764499999999995 ZT12-15 0 0 0 ZT16-19 7.374385 7.374385 7.374385 ZT20-23 4.531045 4.531045 4.531045