condition mean min max ZT0-3 0.18221783333333333 0.0 0.4623005 ZT4-7 0.149989 0.149989 0.149989 ZT8-11 0.077593 0.077593 0.077593 ZT12-15 0.28831825 0.24698799999999999 0.3296485 ZT16-19 0.29704600000000003 0.29704600000000003 0.29704600000000003 ZT20-23 0.0 0.0 0.0