condition mean min max ZT0-3 8.2359747305 6.777285723 9.694663738 ZT4-7 4.53736334 3.978302155 5.096424525 ZT8-11 5.181389498 4.9674674075 5.3953115885 ZT12-15 5.24961533175 4.7942998955 5.7049307680000005 ZT16-19 4.7057590752500005 4.0335040175 5.378014133 ZT20-23 11.01876623775 8.917050655499999 13.12048182