Bitesize has changed! We're updating subjects as fast as we can. Visit our new site to find Bitesize guides and clips - and tell us what you think!

Did you know?

We also have Bitesize study guides covering many subjects at National 4 and National 5 on our Knowledge & Learning BETA website.

Home > Maths I > About the exam > About the exam

Maths I

About the exam

General example

Example - 2009, Paper 2, Question 7


Last week Theresa asked 76 students to record how many hours they spent doing their homework. The results are shown below.

Homework hoursFrequencyHomework hours x frequency
 Total = 76Total = 

Complete the table and find the mean time spent on homework last week. Round your answer to 1 decimal place.

  • Interpret: this is a standard KU mean from a frequency table question.
  • Select: the solution requires the extension of a frequency table and the calculation of the mean from the column totals.
  • Implement and communicate: see the solution below.

Calculate homework hours x frequency column

  • 16, 24, 54, 44, 40, 36, 35 (1 mark KU)

Add homework hours x frequency column

  • 249 (1 mark KU)

Correctly divide answer to above by 76

  • mean = 249 ÷ 76 = 3.2763 (1 mark KU)

Correct rounding

  • 3.3 hrs (1 mark KU)


A picture of Mia Cadaver

Tombstone Timeout

Swot up your sums with Mia Cadaver's maths game

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.