Neuroscience Animations

John H. Krantz, Hanover College, krantzj@hanover.edu

Using the Media

Topics

Neurons

Psychophysics

Vision

Audition

Skin Senses

Statistical Concepts

Hanover College
Psychology Department

Statistical Distributions

Brief description and instructions (DRAFT):

Background:

Different statistics have different distributions.  Here you can look at a variety of distributions.  Currently, you can examine:

• t distribution
• F distribution
• Pearson's r distribution

Using the illustration:

This applet comes up with the t-test setup.

To start the sampling, press the Start button in the upper left corner of the screen.  The number of samples taken (actual number of values for the sample distributions in the top row and the number of samples of size n in the sampling distributions in the lower row) is shown below the Reset button on the upper left corner.  As each sample is taken, the value or the mean will be plotted on its proper histogram.  You can see the histogram develop as the number of samples increase.  To stop the sampling press the Stop button and to start over, press the Reset button.  If you change the sample size the next time you start the sampling, the sample will be reset.

There are also advanced option available in the menus.  You can change the bin size of the histograms, the speed the samples are taken, the distribution of the population from which the samples are taken, and the statistic being plotted. 

Click here to  open the applet.  It will open a new window that will fill your screen.

References: