condition mean min max ZT0-3 3960.45 3960.45 3960.45 ZT4-7 4765.2 4765.2 4765.2 ZT8-11 4887.5 4887.5 4887.5 ZT12-15 4753.05 4753.05 4753.05 ZT16-19 4422.75 4422.75 4422.75 ZT20-23 3644.8 3644.8 3644.8