Normal Distribution (A Level only) (AQA A-Level Mathematics): Flashcards

Symmetrical, bell-shaped

All equal, at center

$68$%

$95$%

$99.7$%

$\mu = 0$, $\sigma = 1$

$Z = \frac{X - \mu}{\sigma}$

How many SDs $X$ is from mean

Probability

$X$ normal with mean $\mu$, variance $\sigma^2$