Questionnaires (WJEC Eduqas GCSE Maths): Revision Note

Exam code: C300

Dan Finlay

Last updated

Questionnaires

What is a questionnaire?

  • A questionnaire is a set of questions

  • A questionnaire can be used to collect data

  • The questions can be open or closed

    • Open questions require written answers

    • Closed questions usually requires a selection between options

What does a good question look like?

  • A good question is clear and is not ambiguous

    • e.g. "Have you revised recently?" is ambiguous as it is not clear what is classed as recent

    • Instead you could ask "How many days has it been since you last revised?"

  • The question is not personal

    • Do not ask for someone's name if it is not needed

  • The question gives a time frame if necessary

    • e.g. "How many times do you visit the gym in one week?"

  • The question is not leading

    • e.g. "Do you agree that my cooking is great?"

What do I write the options for a question?

  • The options should be exhaustive

    • You can include an option for "Other"

    • You can include an option for "Over 5 hours" or "Less than 20%"

  • The options could be grouped

    • Instead of asking for a person to state their age, you could give them age ranges to choose from

  • The options should not overlap

    • e.g. "2 to 4" and "4 to 5" overlap

      • Which option would someone choose if their answer is 4?

  • Avoid inequalities as they could confusion to the participants of the questionnaire

    • You could ask for the closest answer

      • e.g. "To nearest hour, how long did you sleep last night?"

    • You could use descriptive words to describe inequalities

      • e.g. "At least 4 metres but less than 6 metres"

How do I make results fair?

  • Make sure you ask a random selection of people

    • Do not only ask one group of people who might give the same answer

  • Make sure you ask enough people

    • There is no exact number as it depends on the situation

    • If there are 1000 students in a school and you only ask 10 then that is only 1%

Worked Example

Rhys wants to investigate how fast teenagers can swim.

Rhys plans to out the members of the swimming club at his school to complete his questionnaire.

Give one reason why this sample might not be suitable.

The members of the swimming club are likely to be good swimmers, so can swim fast. They will not be representative of all teenagers.

One question on his questionnaire is:

How many 25 metre laps can you swim?

▢ 0 - 2
▢ 2 - 4
▢ 4 - 6
▢ More than 6

  1. The question does not give a time frame.

  2. The options overlap.

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Dan Finlay

Author: Dan Finlay

Expertise: Maths Subject Lead

Dan graduated from the University of Oxford with a First class degree in mathematics. As well as teaching maths for over 8 years, Dan has marked a range of exams for Edexcel, tutored students and taught A Level Accounting. Dan has a keen interest in statistics and probability and their real-life applications.