Statistical power and multivariate designs
Multivariate research designs decrease statistical power and increase the needed sample size
Larger sample sizes will always be needed in order to account for multivariate associations. At least 20 observations per continuous outcome should be taken for every parameter (variable) entered into a multivariate model. At least 30-40 observations are needed for categorical outcomes due to the limited variance associated with measurement. Statistical power decreases with multivariate designs but these designs are desperately needed in the literature to better account for confounding on treatment effects.
Multivariate designs decrease statistical power and increase the needed sample size.
Click on the Power and Effect Size button to continue.
Hire A Statistician
DO YOU NEED TO HIRE A STATISTICIAN?
Eric Heidel, Ph.D., PStat will provide you with statistical consultation services for your research project at $100/hour. Secure checkout is available with Stripe, Venmo, Zelle, or PayPal.
- Statistical Analysis on any kind of project
- Dissertation and Thesis Projects
- DNP Capstone Projects
- Clinical Trials
- Analysis of Survey Data