condition mean min max ZT0-3 65.54308977583332 63.314880265 67.77129928666666 ZT4-7 71.00676380666667 67.87507850333333 74.13844911 ZT8-11 82.33950494999999 76.73317631 87.94583358999999 ZT12-15 106.46902616833333 106.13064513666667 106.8074072 ZT16-19 100.94044566000001 100.4055582 101.47533312000002 ZT20-23 97.89746869666666 96.65955491 99.13538248333333