Lesson T5.1.2

T5.1.2 Collecting and analysing data Quiz: KS3 Computing, Unit 5

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson T5.1.2, Collecting and analysing data: 20 multiple choice questions for the KS3 Computing (National Curriculum), Unit 5: Creative digital projects, written with Revision Ninja.

Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.

Host this setFree Play

The 20 questions

  1. What is primary data?

    • Data that is copied automatically from one spreadsheet to another without any checking
    • Data that is stored in a database by a government department for public use only
    • Data collected first-hand by the person using it, for example from their own survey
    • Data that has already been collected and published by someone else for other uses

  2. What is secondary data?

    • Data that is stored on a second device so that the first device can be used for work
    • Data that someone else has already collected, such as published statistics or a government report
    • Data that is collected from a survey after the first survey has been completed
    • Data that is collected by a second person at the same time as the first person's data

  3. Why should a questionnaire be tested before it is used in a survey?

    • To reduce the size of the file so that the survey can be sent more quickly by email
    • To change the colour of the questions so that they are easier to see on screen
    • To make sure every respondent answers in exactly the same way as the others
    • To find confusing questions and fix them before the real data is collected

  4. A pupil asks 5 friends about their favourite colour. What is the main problem with this sample?

    • It is invalid, because colours can never be the subject of a survey carried out by a pupil
    • It is small and not representative, so the results may not reflect the wider group
    • It is too large, because five people is more than the number needed for any survey
    • It is correct, because friends always give the most accurate answers in any survey

  5. What is the mean of the numbers 4, 7, 7, 9 and 13?

    • 10
    • 8
    • 9
    • 7

  6. What is the median of the numbers 4, 7, 7, 9 and 13?

    • 9
    • 7
    • 8
    • 13

  7. What is the mode of the numbers 4, 7, 7, 9 and 13?

    • 4
    • 13
    • 7
    • 9

  8. What is the range of the numbers 4, 7, 7, 9 and 13?

    • 8
    • 4
    • 9
    • 13

  9. Which average is the least affected by one very extreme value in a data set?

    • The total, which adds up every value in the data set in one single step
    • The mean, which adds all values together and so is pulled by an extreme value
    • The range, which is the difference between the largest and smallest values
    • The median, which depends on the middle value rather than on the total

  10. A sensor logs temperature every minute. What is this method of collecting data called?

    • Data compression
    • Data logging
    • Data encryption
    • Data mining

  11. Which chart is most suitable for showing how a value changes over time?

    • A pictogram, which uses a symbol to represent a number of items in a category
    • A line graph, which plots readings in time order and connects them
    • A pie chart, which shows how a whole is divided into parts by percentage
    • A table, which lists each value without showing any pattern across the period

  12. Which chart is best for comparing the number of pupils in different year groups?

    • A histogram, which groups continuous data into ranges of equal width on the axis
    • A scatter graph, which shows the relationship between two different measurements
    • A line graph, which is best used to show a continuous change over a period of time
    • A bar chart, which compares the size of separate categories side by side

  13. What is the purpose of a scatter graph?

    • To show the number of times each word appears in a passage of text in order
    • To show whether there is a relationship between two sets of values
    • To show how each category in a survey contributes to a single whole total value
    • To show the position of each pixel in a bitmap image on the screen of the device

  14. Which is a sensible check when analysing survey data?

    • Check for values that are impossible or out of range before drawing conclusions
    • Delete all responses that disagree with the pupil's own opinion before analysing them
    • Change every answer to match the most common answer so that the data is consistent
    • Round every value to the nearest 100 so that the data is easier to read on a graph

  15. Why is a larger, random sample usually better than a small one?

    • It is more likely to represent the whole population, so the results are more reliable
    • It always produces an exact answer that matches the population with no uncertainty
    • It takes less time to collect, so the pupil can finish the survey more quickly overall
    • It makes the mean and the median identical, so the averages are always the same value

  16. What is bias in data collection?

    • A small difference between two readings that is caused by normal variation in the data
    • A mistake in typing the numbers into a spreadsheet that can easily be corrected
    • A choice of colour on a chart that makes the data harder to read on the screen
    • A systematic tendency that makes the results lean in one direction rather than being fair

  17. A survey asks: 'Most people agree the new cafeteria food is terrible, so what do you think of it?' What is the main problem with this question?

    • It is too vague, because it does not say which cafeteria the survey is about
    • It is leading, because the wording suggests the respondent should agree with others
    • It is closed, because the respondent is given a fixed set of choices to pick from
    • It is numerical, because the answer has to be a number rather than an opinion

  18. Which of these shows a sound method of collecting data in a school?

    • Only the pupils in the first class of the day, asked before they have started lessons
    • A random sample of pupils from each year group, asked the same questions in the same way
    • Only the pupils who sit at the front of the room, because they are the most engaged
    • Only the pupils who volunteer to answer a question on the school website during break

  19. What does a sample size of 40 mean in a survey?

    • The number of people or items whose responses are included in the data collected
    • The number of years over which the survey has been running in the school
    • The number of pages that the survey report is printed on when it is shared with the class
    • The number of questions that are asked of each person in the survey at the same time

  20. A pupil's data has a value of 300 when all the other values are between 20 and 30. What should the pupil consider?

    • Whether the value is an outlier caused by an error or is a genuine unusual result
    • Whether the value should be changed to 20, because every value must match the minimum
    • Whether the value should be ignored, because outliers are never included in any graph
    • Whether the value should be deleted immediately, because all values must be the same size

All KS3 Computing quizzes