Statistical Tools on the Web

Normal Distribution Software

  • Computing Areas under the Normal Curve

  • Normal Probability Calculation Demonstrations from Seeing Statistics by Gary H. McClelland.  Professor McClelland's descriptions are copied verbatim below.

    • Normal Probabilities. Use this applet to answer all questions which specify a range of raw or z-scores and ask for the probability. 

    • Normal Probabilities. This is a more interactive applet than the previous one; it allows the use to drag the ends of the included region with the mouse. This applet is more fun but its accuracy is limited by the resolution of the screen. However, it may be more educational because the user directly experiences the connection between the shaded area under the normal distribution and the probability. 

    • z-scores. Use to answer all questions which specify a probability and ask for the relevant range of raw or z-scores. Also does transformations between raw scores and z-scores in either direction. [Note: this is the
      applet that was formally found at this link.] 

    • Normal Tables. This applet illustrates how to use "old-fashioned" tables of normal probabilities. This applet is sometimes temperamental and requires a tall browser window. 

  • Normal Probability and Percentiles 

Statistical Software Packages

  • Rice Virtual Lab in Statistics [ Analysis Lab*  ||Simulations and Demonstrations || **HyperStat Online || Case Studies ]

    • *The analysis lab is a spreadsheet like statistics package.  Performs descriptive statistics, boxplots,  histograms, correlation and regression, and t-tests.  This package is still being tested but appears to be very good.

    • **HyperStat is an online introductory statistics text. It covers most of the topics covered in our text.

  • StatletsÒ Statlets is a spreadsheet like statistics package.  Statlets performs descriptive statistics, boxplots,  histograms, correlation and regression, and t-tests. 

 

Home    Last Modified June 05, 2002