condition mean min max ZT0-3 34.959328335 27.71665334 42.202003330000004 ZT4-7 49.168039988333334 46.71812076 51.61795921666667 ZT8-11 49.160469324999994 46.04007162 52.280867029999996 ZT12-15 57.46788195 57.22055829 57.71520561 ZT16-19 59.614779955 55.46725728 63.76230263 ZT20-23 52.265667945000004 48.51169724333334 56.019638646666664