condition mean min max ZT0-3 0.7382805 0.7114615 0.7650995 ZT4-7 0.59156 0.59156 0.59156 ZT8-11 2.7578300000000002 2.7578300000000002 2.7578300000000002 ZT12-15 0 0 0 ZT16-19 2.4221 2.4221 2.4221 ZT20-23 1.38498 1.38498 1.38498