condition mean min max ZT0-3 47.569325000000006 43.8376 51.301050000000004 ZT4-7 57.91755 57.91755 57.91755 ZT8-11 28.208199999999998 28.208199999999998 28.208199999999998 ZT12-15 0 0 0 ZT16-19 37.3902 37.3902 37.3902 ZT20-23 38.700599999999994 38.700599999999994 38.700599999999994