Recent Additions|
|
Convert to Standard Scores |
|
Data Transformations |
|
Randomizer (revised)Q
| | |||||
Utilities|
| Statistical Tables Calculator |
| Convert to Standard Scores |
| Data Transformation |
| Randomizer |
| Note Pad |
| Simple Graph Maker |
| Pocket Calculator |
| PDF & Excel Downloads |
| | |||||||||||
Clinical Research Calculators|
| Calculators 1-3. For prevalence, sensitivity, specificity, predictive values, likelihood ratios, etc. |
| Kaplan-Meier Survival Probability Estimates |
| Kappa as a Measure of Concordance in Categorical Sorting |
| Chi-Square, Cramer's V, and Lambda for a Rows by Columns Contingency Table |
| Simple Logistic Regression [the plain-vanilla version] |
| Simple ROC Curve Analysis | | ||||||||
Probabilities|
| Randomness and the Appearence of Pattern [Demo] |
| For Sequential Sampling: Pascal (Negative Binomial) Probabilities |
| Backward Probability Template |
| Bayes' Theorem: Conditional Probabilities |
| Bayes' Theorem: Adjustment of Subjective Confidence |
| [See also: Clinical Research Calculators.] | | ||||||||
Distributions|
| Sampling Distribution Generators~ | ~ | Binomial Distributions | ~ | Poisson Distributions | ~ | Chi-Square Distributions | ~ | t-Distributions | ~ | Distributions of the Pearson Product-Moment Correlation Coefficient | ~ | Normal Distributions | ~ | Distributions of Sample Means | ~ | Distributions of Sample Mean Differences |
| Central Limit Theorem [Text & Demo] |
| z to P Calculator |
| Standard Error of Sample Means |
| Standard Error of the Difference Between the Means of Two Samples | | |||||||||||||||||||||||||||||
Procedures Applicable to Categorical Frequency Data|
| Exact Binomial Probability Calculator |
| Binomial z-Ratio Calculator |
| Poisson Approximation of Binomial Probabilities |
| Fitting an Observed Frequency Distribution to the Closest Poisson Distribution |
| For Sequential Sampling: Pascal (Negative Binomial) Probabilities |
| Chi-Square "Goodness of Fit" Test |
| Kolmogorov-Smirnov One-Sample Test |
| Fisher Exact Probability Test |
| Phi Coefficient of Association |
| Rates, Risk Ratio, Odds, Odds Ratio, Log Odds |
| 2x2 Chi-Square |
| Fisher Exact Probability Test for Tables Larger than 2x2 |
| Chi-Square, Cramer's V, and Lambda for a Rows by Columns Contingency Table |
| Log-Linear Analysis for a 3-Way Contingency Table |
| Kappa as a Measure of Concordance in Categorical Sorting | | |||||||||||||||||
Procedures Applicable to Proportions|
| The Confidence Interval of a Proportion |
| The Confidence Interval for the Difference Between Two Independent Proportions |
| Significance of the Difference Between Two Independent Proportions |
| McNemar's Test for Correlated Proportions in the Marginals of a 2x2 Contingency Table | | ||||||
Procedures Applicable to Ordinal Data|
| Rank-Order Correlation |
| Mann-Whitney Test |
| Wilcoxon Signed-Ranks Test |
| Kruskal-Wallis Test |
| Friedman Test | | |||||||
Correlation & Regression|
| Basic Linear Correlation & Regression |
| Matrix of Intercorrelations |
| Multiple Regression |
| 0.95 and 0.99 Confidence Intervals for r |
| Estimating the Population Value of rho on the Basis of Several Observed Sample Values of r |
| Test for the Heterogeneity of Several Values of r |
| The Significance of an Observed Value of r |
| Significance of the Difference Between Two Independent Values of r |
| Significance of the Difference Between an Observed Value of r and a Hypothetical Value of rho |
| First- and Second-Order Partial Correlations |
| Phi Coefficient of Association |
| Point Biserial Coefficient |
| Correlation for Unordered Pairs: Eta2, Intraclass Correlation, & Resampling of r |
| Simple Logistic Regression | | ||||||||||||||||
t-Tests and Procedures|
| t-Tests for the Significance of the Difference Between the Means of Two Samples (independent or correlated) |
| Single Sample t-Test |
| 0.95 Confidence Interval for the Estimated Mean of a Population | | |||||
Analysis of Variance|
| One-Way ANOVA for Independent or Correlated Samples |
| Two-Way Factorial ANOVA for Independent Samples |
| Two-Factor ANOVA with Repeated Measures on One Factor |
| Two-Factor ANOVA with Repeated Measures on Both Factors |
| 2x2x2 ANOVA for Independent Samples |
| Orthogonal Latin Square Designs for n=j2 | | ||||||||
Analysis of Covariance|
| One-Way ANCOVA for Independent Samples |
| Two-Way Factorial ANCOVA for Independent Samples | | ||||
Miscellanea|
| Basic Sample Stats |
| Resampling Probability Estimates for the Difference Between the Means of Two Independent Samples |
| The Power of the Chi-Square "Goodness of Fit" Test [Text & Demo] |
| Election Year Special: Scoping the Polls | | ||||||