The approval rating of the President is the percentage of people surveyed who believe the President is
Question:
Fig. 90
a. Describe the shape of the distribution. What does this mean in this situation?
b. The approval rating 54% is at the 50th percentile, which is a measure of the center. The center of a unimodal distribution tends to be a typical value. Is that true for this situation? Explain.
c. Figures 91 and 92 display histograms of President Obama€™s approval ratings for the first half of 2009 and the second half of 2009, respectively. Is the 50th percentile for the first half of 2009 less than, greater than, or approximately equal to the 50th percentile for the second half of 2009? What does that mean in this situation?
Fig. 91
Fig. 92
d. Compare the spreads of the distributions for the two halves of 2009.
e. How do the distributions for the two halves of 2009 explain why the distribution for all of 2009 is bimodal?
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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