condition mean min max ZT0-3 911.5999999999999 911.5999999999999 911.5999999999999 ZT4-7 834.7 834.7 834.7 ZT8-11 632.55 632.55 632.55 ZT12-15 649.25 649.25 649.25 ZT16-19 1038.5 1038.5 1038.5 ZT20-23 1075.95 1075.95 1075.95