Let€™s continue to look at the DJIA discussed in problem 26. Table 2.6.8 shows 23 daily observations of the value of the DJIA, with 22 observations of the net change from one observation to the next, and the percent change in the DJIA from one observation to the next.
a. What is an elementary unit for this data set?
b. What kind of a data set is this: univariate, bivariate, or multivariate?
c. Which of these variables are quantitative? Which are qualitative?
d. If there are any qualitative variables in this data set, are they nominal or ordinal?
e. Is this cross-sectional or time-series data?

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TABLE 2.6.8 Daily Values and Changes of the DJIA during January 2002 Percent DJIA Net Change Change Date 31Jan-02 9,920.00 30Jan-02 9,762.86 29Jan-02 9,618.24 28Jan-02 9,865.75 25Jan-02 9,840.08 24-Jan-02 9,796.07 23Jan-02 9,730.96 22Jan-02 9,713.80 18-Jan-02 9,77185 17-Jan-02 9,850.04 16-Jan-02 9,712.27 21188 15-Jan-02 9,924.15 14-Jan-02 9,891.42 11-Jan-02 9,987.53 10-Jan-02 10,067.90 9-Jan-02 10,094.10 8-Jan-02 10,150.50 7-Jan-02 10,197.00 4-Jan-02 10,259.70 3-Jan-02 10,172.10 2-Jan-02 10,073.40 31-Dec-01 10,021.50 157.14 144.62 -24751 25.67 44.01 65.11 17.16 -58.05 -78.19 137.77 1.58% 1.48 -2.57 0.26 0.45 0.66 0.18 -0.60 -0.80 1.40 -2.18 0.33 -0.97 -0.80 -0.26 0,56 -0.46 -0.61 0.85 0.97 0.52 32.73 -96.11 -80.37 -26.20 -56.40 46.50 -62.70 87.60 98.70 51.90