Chapter 2: Q. 67 (page 137)
Of the three measures, which tends to reflect skewing the most, the mean, the mode, or the median? Why?
Short Answer
The outliers have the greatest impact on the mean, therefore mean tends to reflects skewing the most.
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Chapter 2: Q. 67 (page 137)
Of the three measures, which tends to reflect skewing the most, the mean, the mode, or the median? Why?
The outliers have the greatest impact on the mean, therefore mean tends to reflects skewing the most.
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Use the following information to answer the next three exercises: State whether the data are symmetrical, skewed to the left, or skewed to the right.
The following data show the number of months patients typically wait on a transplant list before getting surgery.
The data are ordered from smallest to largest. Calculate the mean and median.
The most obese countries in the world have obesity rates that range from 11.4% to 74.6%. This data is summarized in the following table.

a. What is the best estimate of the average obesity percentage for these countries?
b. The United States has an average obesity rate of 33.9%. Is this rate above average or below?
c. How does the United States compare to other countries?
Use the following information to answer the next nine exercises: The population parameters below describe the full-time equivalent number of students (FTES) each year at Lake Tahoe Community College from 1976–1977 through 2004–2005.
• μ = 1000 FTES
• median = 1,014 FTES
• σ = 474 FTES
• first quartile = 528.5 FTES
• third quartile = 1,447.5 FTES
• n = 29 years
What additional information is needed to construct a box plot for the FTES for 2005-2006 through 2010-2011 and a box plot for the FTES for 1976-1977 through 2004-2005?
Construct a frequency polygon for the following:
a.

b.

c.

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