condition mean min max ZT0-3 0.035259 0.0 0.070518 ZT4-7 0.0 0.0 0.0 ZT8-11 0.03488335 0.03488335 0.03488335 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.03501835 0.03501835 0.03501835