condition mean min max ZT0-3 4.1786060565 3.429369277 4.927842836 ZT4-7 3.3084082442500002 3.2345032585 3.3823132300000003 ZT8-11 4.0962235705 3.3630106769999997 4.8294364640000005 ZT12-15 6.73657095175 5.312984289 8.160157614500001 ZT16-19 6.0508987465 5.509525142999999 6.59227235 ZT20-23 9.834266616499999 8.243752545 11.424780688