condition mean min max ZT0-3 0.914012 0.498065 1.3478175000000001 ZT4-7 0.5685905 0.5685905 0.5685905 ZT8-11 0.0982645 0.0982645 0.0982645 ZT12-15 0.41477175 0.0 0.8295435 ZT16-19 0.3706705 0.3706705 0.3706705 ZT20-23 0.0 0.0 0.0