Biostatistics 2 provides descriptive statistics and statistical tests and procedures of interest primarily to students and researchers in the biological and medical sciences. The provided tests and procedures may also prove useful to those in other fields who draw inferences about large populations from measurements taken from random samples.
Biostatistics currently provides the the following tests and procedures:
for interval data (normally distributed populations) —
* t test
* analysis of variance (ANOVA)
* paired t test
* repeated measures ANOVA
* linear regression and correlation
for nominal data—
* chi square (χ²)
* McNemar’s test
* Cochran Q test
* relative risk
* odds ratio
for ordinal data (and interval data from populations not known to be normally distributed)—
* Mann-Whitney rank-sum test
* Kruskal-Wallis test
* Wilcoxon rank-sum test
* Friedman test
* Spearman rank correlation
for survival time data—
* Kaplan-Meier survival curves
* log rank test
* Gehan test