II. Descriptive Statistics B. Numerical Descriptions for Univariate Data

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II. Descriptive Statistics B.
Numerical Descriptions for Univariate Data
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• Example
• Suppose that we take a random sample of eight
  fuel efficient cars and record the gas mileage.
  Calculate the following for the results 33, 41,
  45, 35, 37, 39, 37, 34
• Sample Mean
• Sample Median
• Sample Mode
• Five Number Summary
• Sample Range
• Interquartile Range
• Sample Variance
• Sample Standard Deviation

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• If the mean is bigger than the median, what is
  the shape of the distribution?
• If the mean is smaller than the median, what is
  the shape of the distribution?
• If the mean and median are equal, what is the
  shape of the distribution