Question: The annual average values of the Consumer Confidence Index for the years 1967-1996 are given in the file P2_28.XLS. Construct a boxplot to find the

The annual average values of the Consumer Confidence Index for the years 1967-1996 are given in the file P2_28.XLS. Construct a boxplot to find the middle 50% of this distribution of values. Characterize the nature and amount of the variability about the interquartile range in this case.

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