condition mean min max ZT0-3 502.75 502.75 502.75 ZT4-7 742.2 742.2 742.2 ZT8-11 626.15 626.15 626.15 ZT12-15 568.4 568.4 568.4 ZT16-19 498.79999999999995 498.79999999999995 498.79999999999995 ZT20-23 593.25 593.25 593.25