condition mean min max ZT0-3 116.19645 99.41035 125.587 ZT4-7 126.543 126.543 126.543 ZT8-11 116.66635 116.66635 116.66635 ZT12-15 177.12574999999998 157.34699999999998 196.90449999999998 ZT16-19 157.6 157.6 157.6 ZT20-23 157.7905 157.7905 157.7905