condition mean min max ZT0-3 265.0 265.0 265.0 ZT4-7 309.9 309.9 309.9 ZT8-11 282.85 282.85 282.85 ZT12-15 200.6 200.6 200.6 ZT16-19 144.95 144.95 144.95 ZT20-23 227.75 227.75 227.75