condition mean min max ZT0-3 1.3143250145 1.146474222 1.482175807 ZT4-7 1.7142010540000001 1.507430061 1.9209720470000002 ZT8-11 1.6082921605 1.518767281 1.6978170399999999 ZT12-15 1.59158349225 1.430408275 1.7527587095000001 ZT16-19 1.9084424945 1.5706771824999999 2.2462078065 ZT20-23 2.8350268822499998 2.8223651125 2.8476886519999995