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Consolidation Of Statistics

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Agenda

  • Statistics Concepts
  • Practice

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Statistics Concepts

Approximating a bunch of stuff with a small amount of stuff

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Statistics Concepts

  • The purpose of statistics is to approximate many items with a relatively small set of characteristics
  • For our purposes this means treating any large dataset as normal then applying basic statistical tools

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Single Variable Statistics

  • A normal curve has
    • Measures of central tendency (mean, median, mode)
    • Measure of spread (variance, standard deviation)
  • Skew is the difference from the normal curve

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Single Variable Statistics

  • A different view of the data is a cumulative frequency chart
  • Can be used to visualize spread
  • Outliers are 1.5 IQR

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Bivariate Statistics

  • When matching two variables, use bivariate statistics
  • Correlations can be linear or nonlinear
  • Correlation coefficient between -1 and 1

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Predictions Using Normal Curves

  • Given a normal curve the area can be interpreted as a probability
  • Normalize the standard deviation and mean using
  • Can go backwards given the probability to find the corresponding z-score

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Practice

Yup. It’s a given.

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Practice

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Credits

Special thanks to all the people who made and released these awesome resources for free:

  • Presentation template by SlidesCarnival

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