condition mean min max ZT0-3 351.65 351.65 351.65 ZT4-7 199.0 199.0 199.0 ZT8-11 206.3 206.3 206.3 ZT12-15 227.5 227.5 227.5 ZT16-19 284.45 284.45 284.45 ZT20-23 350.95000000000005 350.95000000000005 350.95000000000005