condition mean min max ZT0-3 58.519099999999995 58.519099999999995 58.519099999999995 ZT4-7 48.873000000000005 48.873000000000005 48.873000000000005 ZT8-11 39.867850000000004 39.867850000000004 39.867850000000004 ZT12-15 48.9139 48.9139 48.9139 ZT16-19 62.12635 62.12635 62.12635 ZT20-23 59.8618 59.8618 59.8618