condition mean min max ZT0-3 0.5080359999999999 0.5080359999999999 0.5080359999999999 ZT4-7 0.7138 0.7138 0.7138 ZT8-11 0.44649133333333335 0.44649133333333335 0.44649133333333335 ZT12-15 0.642335 0.642335 0.642335 ZT16-19 0.62667 0.62667 0.62667 ZT20-23 0.51064 0.51064 0.51064