condition mean min max ZT0-3 6.010389999999999 5.51724 6.503539999999999 ZT4-7 5.972645 5.972645 5.972645 ZT8-11 3.023435 3.023435 3.023435 ZT12-15 0 0 0 ZT16-19 2.030315 2.030315 2.030315 ZT20-23 4.40495 4.40495 4.40495