This applet displays various distributions and allows the user to experiment with the parameters to see the effects on the curve.
This applet displays various distributions and allows the user to experiment with the parameters to see the effects on the curve.
This applet performs the Student's t test on two sets of data, and reports the average and variance for both sets of data, the t score, degrees of freedom, and one and two tailed P values.
This java applet can be used to determine whether or not the means in two sample populations are significantly different.
This simulation involves a series of balls passing through bins to eventually yield a normal distribution. Information is also provided about what the normal distribution is.
A searchable database of approximately 600 applets for teaching introductory statistics topics, including graphical displays, descriptive statistics, probability concepts, random variables, sampling and sampling distributions, confidence intervals, hypothesis testing, ANOVA, chi-square tests, correlation and regression, time series and forecasting, decision analysis, and quality control charts. Applets are arranged by topic and intended use. Information on each applet includes source and url as well as a brief description.
DataFerrett is a unique data analysis and extraction tool -- with recoding capabilities -- to customize federal, state, and local data to suit your requirements. Using DataFerrett, you can develop an unlimited array of customized spreadsheets that are as versatile and complex as your usage demands. The DataFerrett helps you locate and retrieve the data you need across the Internet to your desktop or system, regardless of where the data resides. You can then develop and customize tables. Selecting your results in your table you can create a chart or graph for a visual presentation into an html page. Save your data in the databasket and save your table for continued reuse. The DataFerrett is a Beta testing version that will incorporate the latest bug fixes, enhancements, and new functionality that will be rolled into the DataFerrett after testing has been completed.
This resource defines and explains standard deviation and the normal distribution.
Use the Sample Size Calculator to determine the sample size you need in order to get results that reflect the target population as precisely as needed. You can also find the level of precision you have in an existing sample. The site also describes terms you need to know to understand confidence intervals and what they mean.
This collection of Analysis Tools can assist students and researchers with questions about study desgin, data analysis, and probability. Topics include sample size, power, survival, binomial probabilities, interaction, Fisher's exact test, one and two sample tests, and more.
This resource defines a pie chart. It also allows the user to input values to create their own graphs. The user has control over the title, up to 15 slices, the color of each slice, and can choose a 3-D option.