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Resources

Resources

Find statistical resources for non-statisticians.

Conduct a study

Interpret results

Plan a study

Finding and working with a statistician

Guidance on how to find and work with a biostatistician.

Sample size calculators

Free online calculators to estimate the needed sample size for a straightforward one- or two-group study.

Power and sample size concepts

These resources explain the concepts of power and sample size and what they depend on.

Study design

Overview of the main observational and experimental study designs and the advantages and limitations of each.

Conduct a study

Data collection and management

Guidance on collecting and managing study data.

Analyzing data

Non-parametric methods

Commonly used non-parametric methods and their advantages and disadvantages.

Multiple testing

What multiple testing is, why it is problematic, and how to recognize and control for it.

Basic statistical tests

T-tests and chi-squared tests: what the tests are for, when to use them, and how to interpret the results.

Interpreting results

Hypothesis tests and p-values

Concepts involved in carrying out hypothesis tests and correctly interpreting the resulting p-values.

Screening and diagnostic tests

Key concepts involved in designing, evaluating and interpreting the results of diagnostic tests.

Post-hoc power analyses

What post-hoc power analyses are and why they aren’t useful in most cases.

Biostats4you

The Biostats4you website was developed to serve medical and public health researchers and professionals who wish to learn more about biostatistics.

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