condition mean min max ZT0-3 56.276733333333326 22.2639 76.22885 ZT4-7 95.61465 95.61465 95.61465 ZT8-11 34.3097 34.3097 34.3097 ZT12-15 52.016774999999996 34.63845 69.3951 ZT16-19 48.8209 48.8209 48.8209 ZT20-23 74.596 74.596 74.596