Anaes Vivas · Measurement & monitoring physics

Data viva — hypothesis testing, alpha, beta and power

A data viva on the two-distribution diagram of hypothesis testing — the alpha (Type I, false positive, conventionally 0.05), the beta (Type II, false negative, conventionally 0.20), power (1 minus beta, conventionally 0.80), the critical value as the decision threshold, and how moving the threshold or changing the sample size shifts the trade-off. Applied to the emergence-hypertension risk-factor study, the neurological-deterioration risk-prediction study, and the evidence-hierarchies reflection.