condition mean min max ZT0-3 855.0999999999999 855.0999999999999 855.0999999999999 ZT4-7 431.7 431.7 431.7 ZT8-11 455.7 455.7 455.7 ZT12-15 570.75 570.75 570.75 ZT16-19 655.65 655.65 655.65 ZT20-23 1040.0 1040.0 1040.0