Goodness of Fit (Edexcel A-Level Further Mathematics): Flashcards

Tests how well a distribution fits a data set

Never required, even when $\nu = 1$

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

$\nu = n - 1$

Lose one degree of freedom per parameter estimated

Do not reject $H_0$

Reject $H_0$

All expectations must be $\geq 5$

Model fits the data (not data fits the model)

$p = \frac{\bar{x}}{n}$