|
|||
|
Biostats Calculator provides a comprehensive collection of biostatistical calculations. It is designed to provide easy access to the most common tests without resorting to a complex desktop statistics package. It also includes a sample size calculator for epidemiological studies, and can measure the utility and power of diagnostic tests. Every test comes with a description, explaining when the test is applicable, an explanation on how to enter any required data, and a guide to interpreting the results. Interactive balloon help is also available, giving descriptions of technical terms. = Available tests and calculations = All tests generate p values indicating the significance levels of their results, as well as the listed statistics. * Odds ratio - confidence intervals * Relative risk - confidence intervals - number needed to treat * Chi-squared and Fisher exact tests - enter any number of groups - automatic test selection based on sample size - chi-squared statistic * Unpaired t-test - enter data individually or as summary statistics - confidence intervals for difference in means - t statistic * Mann-Whitney U test - U statistic * One-way ANOVA test - F statistic * Paired t-test - confidence intervals for mean difference - t statistic * Wilcoxon signed-rank test - W+ and W- statistics * Pearson correlation - correlation coefficient - determination coefficient * Spearman rank correlation - correlation coefficient * Sample size calculator - enter Type I and Type II error rates (alpha and beta) - allows unequal group sizes to be specified - study can measure dichotomous variables (difference in proportions) or continuous variables (difference in means) - required size of each group, and total size * Diagnostic test utility - specificity - sensitivity - false positive rate, false negative rate - positive and negative predictive value - positive and negative likelihood ratios Future updates to the application will be free to all users. © © 2010 Sam McCall |
You are here: Home // メディカル // Biostats Calculator – Sam McCall
Biostats Calculator – Sam McCall
11月 07, 2014 | コメントは受け付けていません。
Tags: Medical