condition mean min max ZT0-3 0.20094425 0.101259 0.3006295 ZT4-7 1.42021 1.42021 1.42021 ZT8-11 0.5072345 0.5072345 0.5072345 ZT12-15 0 0 0 ZT16-19 0.2984045 0.2984045 0.2984045 ZT20-23 0.9507595 0.9507595 0.9507595