condition mean min max ZT0-3 5.654645809250001 1.9796285884999998 9.32966303 ZT4-7 1.039224467 0.7979953085 1.2804536255 ZT8-11 2.63487932275 1.888799686 3.3809589595 ZT12-15 4.735449444 3.8066192054999997 5.6642796825 ZT16-19 7.2186049274999995 6.9312822605 7.5059275945 ZT20-23 6.577572483 5.2646488125 7.8904961535