The Dow Jones Industrial Averages from 1961 to 1986 are recorded in the following table (data from Dow Jones Investor’s Handbook (1986), Wall Street Journal, January 2, 1987). Do a 5 percent test to determine whether the Dow Jones Industrial Average is a random series of data.

Transcribed Image Text:

Year 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 DJIA 731 652 763 874 969 786 905 944 800 839 885 951 924 Year 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 DJIA 759 802 975 835 805 839 964 899 1,047 1,259 1,212 1,547 1,896