condition mean min max ZT0-3 0.022616375 0.0 0.04523275 ZT4-7 0.0461508 0.0461508 0.0461508 ZT8-11 0.04610615 0.04610615 0.04610615 ZT12-15 0 0 0 ZT16-19 0.04465985 0.04465985 0.04465985 ZT20-23 0.2241705 0.2241705 0.2241705