condition mean min max ZT0-3 722.251006 722.251006 722.251006 ZT4-7 479.870795 479.870795 479.870795 ZT8-11 364.77846650000004 364.77846650000004 364.77846650000004 ZT12-15 424.366615 424.366615 424.366615 ZT16-19 325.98333049999997 325.98333049999997 325.98333049999997 ZT20-23 388.3182835 388.3182835 388.3182835