condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0192056 0.0192056 0.0192056 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0192112 0.0192112 0.0192112 ZT16-19 0.019304066666666665 0.019304066666666665 0.019304066666666665 ZT20-23 0.016069299999999998 0.016069299999999998 0.016069299999999998