condition mean min max ZT0-3 2053.75 2053.75 2053.75 ZT4-7 1693.9 1693.9 1693.9 ZT8-11 1515.9 1515.9 1515.9 ZT12-15 1582.85 1582.85 1582.85 ZT16-19 2234.9 2234.9 2234.9 ZT20-23 2332.3500000000004 2332.3500000000004 2332.3500000000004