condition mean min max ZT0-3 52.324295 52.324295 52.324295 ZT4-7 59.4424805 59.4424805 59.4424805 ZT8-11 44.413443 44.413443 44.413443 ZT12-15 44.538424 44.538424 44.538424 ZT16-19 52.1043085 52.1043085 52.1043085 ZT20-23 54.615821 54.615821 54.615821