Symmetry and Skewness

This applet draws a sample from a population that is chosen to be symmetric, skewed-left, or skewed-right.

How to use the applet

  1. At the top, choose from a skewed-right, symmetric, or skewed-left dataset. The symmetric data set is drawn from eqn, the skewed-right data is drawn from eqn, and the skewed-left data is drawn from eqn, where eqn. Each of the three populations has a mean of 0 and a variance of 2.
  2. Click "Generate New Data" to generate 200 new samples.
  3. A histogram below the samples is plotted, and the mean and median are labeled in red and black, respectively.
  4. Below the histogram, the mean, standard deviation, median, 5% trimmed mean, 10% trimmed mean, and 20% trimmed mean of the dataset are shown.

The applet

No Java Plug-in support for applet, see http://java.sun.com/products/plugin/