Rare and Common

By Danny Kaplan | May 31, 2017

Rare-and-common Little App: The distribution of mother’s age at birth is different for those on private insurance and those on government insurance.

The Rare and common Little App displays a jittered point plot of the response variable, which can be annotated with a variety of statistics often used to quantify “center” and “spread.”

  • Standard deviation “ruler” helps clarify that the sd is a distance rather than a value of the variable.
  • Compare the confidence interval on the mean to the summary interval of the response variable. This helps to dispell the misconception that the confidence interval contains most of the data.
  • Measuring stick to support reading values and differences off the graph.
  • Explore robustness by selecting new samples from the population.

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