Chi Squared Tests for Contingency Tables (Edexcel A-Level Further Mathematics): Quizzes

One occurring doesn't affect the other

$P(A \text{ and } B) = P(A) \times P(B)$

The two events are independent

5

$\frac{(O - E)^2}{E}$

$(rows - 1) \times (columns - 1)$

$\chi^2_{calc} > \chi^2_{crit}$

When $r = 1$

$\frac{(|O - E| - 0.5)^2}{E}$

Combine columns