The file P02_19.xlsx lists annual percentage changes in the Consumer Price Index (CPI) from 1914 through 2017.
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The file P02_19.xlsx lists annual percentage changes in the Consumer Price Index (CPI) from 1914 through 2017. Find and interpret the first and third quartiles and the interquartile range for these annual percentage changes. Discuss whether these are meaningful summary measures for this time series data set. Suppose that the data set listed the actual CPI values, not percentage changes, for each year. Would the quartiles and interquartile range be meaningful in this case? Why or why not?
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Year CPI change 1914 10017 1915 10108 092 1916 10883 767 1917 12825 1784 1918 15042 1728 1919 17333 1524 1920 20042 1563 1921 17850 1094 1922 16750 616 1923 17050 179 1924 17125 044 1925 17542 243 192...View the full answer
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