CAPE Applied Mathematics Unit 2 · 2015 · Paper 2 · Question 4(b)(ii)

A random variable X is assumed to have a normal distribution with mean 9 and standard deviation 1. A table displays observed and expected frequencies over given ranges.

Carry out a χ² goodness-of-fit test at the 5% significance level to determine whether the data may be modelled by a normal distribution with mean 9 and standard deviation 1.

This question uses a figure or table from the paper — you'll see it when you practise.