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Sample size calculations
These utilities can be used to calculate required sample sizes to estimate a population mean or proportion, to detect significant differences between two means or two proportions or to estimate a true herd-level prevalence.
Epidemiological studies
- To estimate a single proportion
- To estimate a single mean
- Two proportions
- Two means with equal sample size and equal variances
- Two means with unequal sample size and unequal variances
- To estimate true prevalence (at animal or herd-level)
- Sample size for a cohort study
- Sample size for a case-control study