condition mean min max ZT0-3 11.47161 10.69312 12.2501 ZT4-7 11.865 11.865 11.865 ZT8-11 11.265195 11.265195 11.265195 ZT12-15 0 0 0 ZT16-19 16.65145 16.65145 16.65145 ZT20-23 24.82425 24.82425 24.82425