condition mean min max ZT0-3 158.131121 158.131121 158.131121 ZT4-7 141.1829025 141.1829025 141.1829025 ZT8-11 120.7037 120.7037 120.7037 ZT12-15 162.191169 162.191169 162.191169 ZT16-19 164.42754150000002 164.42754150000002 164.42754150000002 ZT20-23 212.44541800000002 212.44541800000002 212.44541800000002