condition mean min max ZT0-3 381.0 381.0 381.0 ZT4-7 275.6 275.6 275.6 ZT8-11 252.25 252.25 252.25 ZT12-15 278.75 278.75 278.75 ZT16-19 379.65 379.65 379.65 ZT20-23 456.9 456.9 456.9