Skip to content

Course home

Sign up

2.4.2 The Normal distribution (A-level only)

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748
Question 19

The lifetime of a certain type of battery is normally distributed with a mean of 60 hours. Given that 8% of the batteries last less than 48 hours, find the standard deviation of the lifetimes.

[4]
Markscheme

2.4.2 The Normal distribution (A-level only) Questions

  1. A Level
  2. /Maths
  3. /2.4.2 The Normal distribution (A-level only)

351 exam-style questions on AQA A Level Maths 2.4.2 The Normal distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

Question bank