Tools
This page contains tools that help researchers with simple visualizations and calculations
Tools
| Topic | Description | Video |
|---|---|---|
| Bayes' Theorem Computations | Explore the elements of Bayes' Theorem and see how the formulas combine to give the desired probability calculation. | Video |
| Central Limit Theorem Simulation | Visualize the Central Limit Theorem at work by simulating samples from a population and watching the sampling distribution of the sample mean converge to theoretical results. | Video |
| Confidence Interval Visualization | Simulate the creation of multiple confidence intervals and observe how many capture the true parameter value. | Video |
| Conditional Probability | Explore the intuition behind conditional probability using the West Africa Ebola outbreak in 2014. | Video |
| Confidence Interval from P-value | Bland and Altman's (2011) highly cited paper gives formulas to compute confidence intervals from p-values. This web app automates the process for users. | Video |
| Correlation and Slope Visualization | Visualize data points for specific levels of correlation. Explore linear and non-linear correlation as well as Simpson's paradox. | Video |
| Cumulative Incidence and Prevalence | Use M&Ms to simulate cross sectional and cohort studies and visualize the difference between prevalence and cumulative incidence. | Video |
| Distribution Visualization | Compute probabilities and quantiles while visualizing the Normal, Binomial, Beta, Gamma, Uniform, F and other distributions. | Video |
| Global Water Estimation | This is an in class activity that involves tossing a beach ball shaped like the globe and noting if the right index finger, when the ball is caught, falls on land or water. | Video |
| Monty Hall Paradox | Play the famous game show "Let's Make a Deal." Choose your own version of the game with additional doors or simulate the process to develop the intuition behind the probabilities. | Video |
| NSF Collaborators and Other Affiliations | Upload your CV or other source and this tool generates your COA Table 4 for NSF grants. | Video |
| Power, Type I and II Error Visualization | Displayed is a distribution for the Null hypothesis with shaded rejection regions corresponding to Type I error. Specify various Alternative means and see how Power and Type II error react. | Video |
| Problem of Points Simulation | Play the game that led Pascal and Fermat to lay the foundations of Probability Theory. This two person game has the players decide who is Pascal and who is Fermat and then randomly assigns one to be leading 3-2 in the best of 5 games. Players then toss the coin to see who ultimately wins out. | Video |
| Randomizations | Sealed Envelope has a suite of useful (and free) randomization forms and processes that can help create randomization lists for clinical trials. | Video |
| Relative Risk and Odds Ratio Calculator | Explore the calculations, formulas, and interpretations of important epidemiological measures including relative risks, odds ratios, risk difference and population attributable risk. | Video |
| Roulette Table Simulator | Have a great roulette strategy? Use this web app to set it up and simulate playing the game to see what you can expect over the long run. | Video |
| Sample Size Calculations | Sealed Envelope provides a variety of online sample size calculators that can be helpful for a number of statistical tests. | Video |
| Screening Test Measures | Visualize the statistical analysis of screening test measures such as sensitivity, specificity, positive and negative predictive values, and likelihood ratios. See the impact of disease prevalence in PPV and NPV. | Video |