condition mean min max ZT0-3 0.01718565 0.01718565 0.01718565 ZT4-7 0.02373325 0.02373325 0.02373325 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.02068665 0.02068665 0.02068665 ZT20-23 0.041284 0.041284 0.041284