condition mean min max ZT0-3 1.904365 1.521855 2.286875 ZT4-7 0.0 0.0 0.0 ZT8-11 1.14709 1.14709 1.14709 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.56282 0.56282 0.56282