# Seeing Statistics

This page contains applets from McClelland's Seeing Statistics, which have been integrated with material in Fundamental Statistics for the Behavioral Sciences, (5th edition) by David C. Howell. You merely need to click on the appropriate link to open the applet, and then follow the directions on the page.

#### Chapter 9: Correlation

• Construction of scatter diagrams:
• CorrelationPoints allows user to click on a scatter diagram to add data points with the correlation coefficient automatically updated with each new point.
• PointRemove allows the user to remove individual observations from the data and observe the effect on the correlation coefficient.
• Link between degree of scatter and correlation coefficient:
• CorrelationPicture allows user to use a slider to change the degree of the scatter in the diagram and observe the corresponding change in the correlation coefficient. There are versions with and without the regression line superimposed on the data.
• Factors that affect the correlation:
• RangeRestrict allows user to move sliders to restrict the range on a scatter plot with the old and new correlations being displayed.
• Heterogeneous subsamples allows the user to examine the relationship between X and Y when the data are composed of heterogeneous sets of observations. This builds on the relationship seen in Figure 9.8
Chapter 10:  Regression
Chapter 12:  Hypothesis Tests Applies to Mean; One Sample
Chapter 14:  Hypothesis Tests Applies to Mean; Two Samples
Chapter 15:  Power
Chapter 16:  One-way Analysis of Variance
• F probabilities is an applet that lets you see how the sample distribution of F changes as you change the degrees of freedom for the numerator and denominator.

Chapter 17: Factorial Analysis of Variance

• Graphing interactions illustrates main effects and interactions, and shows how one can change without the other.

Chapter 19:  Chi-square
• MosaicTwoWay is an applet that allows you to change the entries in a contingency table and observe the effects on chi-square.