condition mean min max ZT0-3 76.0739 76.0739 76.0739 ZT4-7 62.06535 62.06535 62.06535 ZT8-11 59.73375 59.73375 59.73375 ZT12-15 66.86715 66.86715 66.86715 ZT16-19 90.98429999999999 90.98429999999999 90.98429999999999 ZT20-23 82.024 82.024 82.024