AQA Certificate Level 3 Mathematical Studies₁₃₅₀

S1.1

knowledge that this is a symmetrical distribution and that the area underneath the normal ‘bell’ shaped curve represents probability

knowledge that approximately $\frac{\mathsf{2}}{\mathsf{3}}$ of observations lie within 1 standard deviation of the mean and that approximately $\mathsf{95}\mathit{\%}$ of observations lie within 2 standard deviations of the mean

S2.1

use of the notation $\mathrm{N}\mathsf{(}\mathit{\mu }\mathsf{,}{\mathit{\sigma }}^{\mathsf{2}}\mathsf{)}$ to describe a normal distribution in terms of mean and standard deviation

use of the notation $\mathrm{N}\mathsf{(}\mathsf{0}\mathsf{,}\mathit{ }\mathsf{1}\mathsf{)}$ for the standardised normal distribution with mean = 0 and standard deviation = 1

S3.1

using a calculator or tables to find probabilities for normally distributed data with known mean and standard deviation

the finding of an unknown mean or standard deviation by making use of percentage points will not be required