condition mean min max ZT0-3 31.97045 31.97045 31.97045 ZT4-7 41.192049999999995 41.192049999999995 41.192049999999995 ZT8-11 23.196 23.196 23.196 ZT12-15 22.3716 22.3716 22.3716 ZT16-19 16.0307 16.0307 16.0307 ZT20-23 24.7387 24.7387 24.7387