condition mean min max ZT0-3 77.004398 77.004398 77.004398 ZT4-7 63.762685000000005 63.762685000000005 63.762685000000005 ZT8-11 49.5522785 49.5522785 49.5522785 ZT12-15 65.291267 65.291267 65.291267 ZT16-19 58.65973 58.65973 58.65973 ZT20-23 52.469096 52.469096 52.469096