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Statistics, 3E by Fatma Abdel-Raouf, Robert A. Donnelly

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CHAPTER5

Calculating Descriptive Statistics: Measures of Dispersion

In This Chapter

  • Calculating the range of a sample
  • Calculating the variance and standard deviation of a sample and population
  • Calculating the variance and standard deviation of grouped data
  • Using measures of relative position to identify outliers
  • Using Excel to calculate measures of dispersion

In Chapter 4, we calculated measures of central tendency by summarizing our data set into a single value. But in doing so, we lost information that could be useful. For the video game example, if the only information I provided you was that the mean of my sample was 6.6 hours, you would ...

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