condition mean min max ZT0-3 216.76283333333333 182.0135 238.877 ZT4-7 238.56099999999998 238.56099999999998 238.56099999999998 ZT8-11 134.084 134.084 134.084 ZT12-15 108.743175 97.35985 120.1265 ZT16-19 99.41235 99.41235 99.41235 ZT20-23 145.99900000000002 145.99900000000002 145.99900000000002