condition mean min max ZT0-3 55.140527 55.140527 55.140527 ZT4-7 407.0486105 407.0486105 407.0486105 ZT8-11 479.2348695 479.2348695 479.2348695 ZT12-15 85.619934 85.619934 85.619934 ZT16-19 47.917508 47.917508 47.917508 ZT20-23 60.710618 60.710618 60.710618