condition mean min max ZT0-3 5.51696171325 4.1327216005 6.901201826 ZT4-7 2.4248934149999997 2.1315241185 2.7182627115 ZT8-11 3.9368766235 3.5052499079999997 4.368503339 ZT12-15 4.691777689749999 4.202216807 5.1813385725 ZT16-19 4.51105817675 4.303746362 4.7183699914999995 ZT20-23 6.224254517 5.988187267500001 6.4603217665