condition mean min max ZT0-3 44.720074999999994 39.52455 49.9156 ZT4-7 35.49125 35.49125 35.49125 ZT8-11 35.476150000000004 35.476150000000004 35.476150000000004 ZT12-15 0 0 0 ZT16-19 38.3676 38.3676 38.3676 ZT20-23 42.127250000000004 42.127250000000004 42.127250000000004