Explain why using data for every day may violate the assumption, used in Exercise I. that the data are a simple random sample.

Date High Year Low Year | Date High Year Low Year | Date High Year Low Year Juni 98 2011 45 1931Jun 11 101 1911 45 1913|Jun 21 99 2012 51 1940 2 97 1925 43 1897 31 99 | 1925 45 | 1910 4 991925 46 1929* 5 100 925 48 1926 6 97 1925 46 1945 16 99 1994 50 1 7 98200847 1894 8 99 2011 49 1977 97 1944 51 1965 28 100 1969 54 1927 9 102 2011 451913 10 100 964 46 1913 12 95 2002 50 190722 101 1988 51 1992 13 96 1954 51 1887 4 98 1994 49 1933 15 101 1994 47 1933 23 98 1988 51 1918 24 100 2010 46 1902 25 100 997 53 1902 26 101 1952 561979 27 99 2010 57 1927 2 17 9599 50 1926 19 99 1994 51 1909 29 104 2012 54 1888 20 99 193 54 192630 100 1959 50 1919