condition mean min max ZT0-3 99.48 99.48 99.48 ZT4-7 201.3038889 201.3038889 201.3038889 ZT8-11 182.425 182.425 182.425 ZT12-15 35.81888888666667 35.81888888666667 35.81888888666667 ZT16-19 6.642222222 6.642222222 6.642222222 ZT20-23 9.538888889999999 9.538888889999999 9.538888889999999