# Scatterplot

• ### Components of r

As described on the page itself: "The simulation shows a scatterplot of data from a bivariate distribution in which the relationship between the two variables is linear. You can change the "input" values of slope, standard error of the estimate, or standard deviation of X for this data sample, and see the effects of your change. "
• ### Scatterplot

This site gives a definition and an example of scatterplots. Topics include positive and negative association.
• ### Probability Models

This site gives an explanation, a definition and an example of probability models. Topics include components of probability models and the basic rules of probability.
• ### Introduction to Biostatistics (Normal Distribution)

The fifth chapter of an online Introduction to Biostatistics course. Three sets of lecture notes are provided. Additionally, links for additional reading and exercises with solutions are provided. A link is also given for a related statistical applet on the normal distribution.

• ### Analysis Tool: Matrix of Intercorrelations (Direct-entry format for small samples)

This page will calculate the intercorrelations (r and r2) for up to five variables, designated as A, B, C, D, and E.

• ### Scatter Plot (Engineering Statistics Handbook)

An explanation of scatter plots, their use, purpose and interpretation. It provides examples of the various relationships described by scatter plots as well as case studies and related techniques.
• ### Normal Tool

This applet demonstrates probability as the area under the normal and the standard normal curves. Students can manipulate mean, standard deviation, and lower and upper bounds to find probabilities.