condition mean min max ZT0-3 1.5251774999999999 1.36737 1.682985 ZT4-7 2.0017 2.0017 2.0017 ZT8-11 1.372655 1.372655 1.372655 ZT12-15 0 0 0 ZT16-19 1.3445049999999998 1.3445049999999998 1.3445049999999998 ZT20-23 1.576235 1.576235 1.576235