Hypothesis Testing (AQA A-Level Mathematics): Flashcards

Set of $x$ values that lead to $H_0$ being rejected

Rejection region

$P(X \geq k) \leq$ significance level

$P(X \leq k)$ crossing significance level boundary

0.025 (5% divided by 2)

Sum probabilities in both critical regions

When observed value falls in critical region

$(1 - \text{sig level})$ boundary

$X \leq a$ or $X \geq b$

Trial and improvement