Further Correlation & Regression (A Level only) (AQA A-Level Mathematics): Quizzes

Population correlation coefficient

$H_0: \rho = 0$

$H_1: \rho > 0$

$H_1: \rho \neq 0$

Critical values from tables

Sample size $n$ and significance level

When $r >$ critical value

Sufficient evidence of correlation

Do not reject $H_0$

When $|r|$ exceeds critical value