condition mean min max ZT0-3 66.72465 66.72465 66.72465 ZT4-7 45.62095 45.62095 45.62095 ZT8-11 42.0308 42.0308 42.0308 ZT12-15 69.3566 69.3566 69.3566 ZT16-19 102.618 102.618 102.618 ZT20-23 92.08055 92.08055 92.08055