condition mean min max ZT0-3 7.787025 7.787025 7.787025 ZT4-7 4.775 4.775 4.775 ZT8-11 6.48822 6.48822 6.48822 ZT12-15 11.2731 11.2731 11.2731 ZT16-19 10.687555 10.687555 10.687555 ZT20-23 11.22105 11.22105 11.22105