condition mean min max ZT0-3 1.95142007125 0.708203402 3.1946367405 ZT4-7 4.18237784075 3.8654977980000003 4.4992578835 ZT8-11 9.20582152625 6.0072246165 12.404418436 ZT12-15 13.4534874125 13.029965149999999 13.877009675 ZT16-19 9.13356463125 8.717196721 9.5499325415 ZT20-23 5.362045377499999 5.0570220175 5.6670687375