IAL Statistics 1 The Normal Distribution exam questions

Exam-style questions on the normal distribution for Edexcel IAL Statistics 1 (WST01): using tables, the standard normal and finding the mean and variance.

This resource covers the whole of Chapter 7 (The Normal Distribution) of the Pearson Edexcel International A Level Statistics 1 course. All questions are original and written in the style of the WST01 paper — these are not reproduced past paper questions.

What’s covered

The shape and properties of the normal distribution
Using the normal distribution tables to find probabilities
Standardising with Z = (X − μ) / σ
Finding a value given a probability, using the inverse tables
Finding an unknown mean or standard deviation from given probabilities
Finding both μ and σ by forming and solving simultaneous equations

How to use it

Works as homework, as consolidation across a sequence of lessons, or as revision before the WST01 paper. Finding both the mean and the standard deviation from two given probabilities is the hardest standard question on this chapter and is covered properly rather than once.

What’s included

Question paper (PDF, printable)
Full worked solutions (PDF) — complete method, not just final answers
Questions arranged in increasing difficulty

Specification

Written for Edexcel International A Level Mathematics, Statistics 1 (WST01), Chapter 7. Also suitable for Edexcel A Level Mathematics 9MA0 statistics content and for legacy S1 courses.