condition mean min max ZT0-3 181.495357 181.495357 181.495357 ZT4-7 177.197635 177.197635 177.197635 ZT8-11 202.09205350000002 202.09205350000002 202.09205350000002 ZT12-15 179.80069 179.80069 179.80069 ZT16-19 179.85105099999998 179.85105099999998 179.85105099999998 ZT20-23 153.9953315 153.9953315 153.9953315