condition mean min max ZT0-3 47.386966666666666 28.53585 59.62845 ZT4-7 25.07105 25.07105 25.07105 ZT8-11 14.03195 14.03195 14.03195 ZT12-15 27.109975 19.0459 35.17405 ZT16-19 35.2761 35.2761 35.2761 ZT20-23 49.6824 49.6824 49.6824