Adjust the outcome variable for differences in secondary, tertiary, or ancillary variables
Confounding variables, both measured and unmeasured, must be taken into account in order to yield valid and causal effects. Random selection and random assignment are used in experimental designs to account for confounding variables and allow for the assumption of equipoise (treatment groups are similar at baseline).
Statistician Services for Professionals
Eric Heidel, Ph.D. will provide the following services for researchers, professionals, and organizations at $100/hour. Secure checkout is available with Stripe or PayPal.
- Statistical Analysis
- Research Design
- Sample Size Calculations
- Diagnostic Testing and Epidemiological Calculations
- Survey Design and Psychometrics
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