condition mean min max ZT0-3 1.39968 1.0389 2.023975 ZT4-7 1.028255 1.028255 1.028255 ZT8-11 1.04115 1.04115 1.04115 ZT12-15 0.566375 0.0 1.13275 ZT16-19 2.01888 2.01888 2.01888 ZT20-23 1.138255 1.138255 1.138255