condition mean min max ZT0-3 0.0059921 0.0059921 0.0059921 ZT4-7 0.01448105 0.01448105 0.01448105 ZT8-11 0.040877250000000004 0.040877250000000004 0.040877250000000004 ZT12-15 0.0452715 0.0452715 0.0452715 ZT16-19 0.06588886666666666 0.06588886666666666 0.06588886666666666 ZT20-23 0.0064284 0.0064284 0.0064284