condition mean min max ZT0-3 33.395327 33.395327 33.395327 ZT4-7 57.82494150000001 57.82494150000001 57.82494150000001 ZT8-11 72.00618 72.00618 72.00618 ZT12-15 49.85036 49.85036 49.85036 ZT16-19 53.94173 53.94173 53.94173 ZT20-23 45.966202499999994 45.966202499999994 45.966202499999994