Lesson 3.1.4.9.6

3.1.4.9.6 Characteristics of the normal distribution Quiz: AQA Psychology, Unit 4

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 3.1.4.9.6, Characteristics of the normal distribution: 20 multiple choice questions for the AQA GCSE Psychology (8182), Unit 4: Research methods, written with Revision Ninja.

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The 20 questions

  1. What shape is a standard normal distribution curve?

    • Asymmetrical
    • U-shaped
    • Linear
    • Bell-shaped

  2. Where are the mean, median and mode located in a normal distribution?

    • At the tails
    • At the centre
    • On the left
    • On the right

  3. What term describes a data distribution curve that is asymmetrical?

    • Bimodal distribution
    • Uniform distribution
    • Skewed distribution
    • Normal distribution

  4. In a normal distribution, where do most scores cluster?

    • Around the mean
    • Below the minimum
    • At the extremes
    • In the tails

  5. What do the tails of a normal distribution curve represent?

    • Rare scores
    • Modal scores
    • Average scores
    • Frequent scores

  6. Why is the normal distribution useful when analysing human traits?

    • Predicts typical scores
    • Proves causal relationships
    • Guarantees absolute certainty
    • Eliminates sample bias

  7. How many distinct peaks does a bimodal distribution have?

    • Three
    • One
    • Zero
    • Two

  8. In a symmetrical distribution, which two measures are equal?

    • Range and mode
    • Mode and frequency
    • Mean and range
    • Mean and median

  9. A normal distribution of test scores has a mean of 60. Which score is most typical?

    • Around 30
    • Around 120
    • Around 90
    • Around 60

  10. What shape describes a symmetrical bell-shaped data curve?

    • Bimodal distribution
    • Normal distribution
    • Negative skew
    • Positive skew

  11. What type of distribution has a long tail extending to the right?

    • Positively skewed
    • Normally distributed
    • Negatively skewed
    • Bimodal

  12. Which distribution features most scores clustered symmetrically around the mean?

    • Negatively skewed
    • Bimodal distribution
    • Normal distribution
    • Positively skewed

  13. What happens to frequency as scores move further from the mean in a normal distribution?

    • It decreases
    • It stays constant
    • It doubles
    • It increases

  14. A distribution is perfectly symmetrical and its mean is 45. What is the median?

    • 45
    • 40
    • 90
    • 50

  15. In a distribution where the mean is significantly higher than the median, what skew is present?

    • Positive skew
    • Negative skew
    • Bimodal distribution
    • Zero skew

  16. Why must a researcher check for normality before choosing a statistical test?

    • Tests assume normality
    • Eliminates sampling error
    • Increases sample size
    • Ensures high validity

  17. Which two values are always equal in a perfectly normal distribution?

    • Frequency and score
    • Mode and range
    • Range and median
    • Mean and mode

  18. Where are most scores located in a normal distribution curve?

    • In the tails
    • On the right
    • On the left
    • Near the centre

  19. What is the relationship between the mean, median, and mode in a normal distribution?

    • They are equal
    • Median is lowest
    • Mode is highest
    • Mean is highest

  20. Where does the long tail point in a negatively skewed distribution?

    • To the right
    • Towards both ends
    • To the centre
    • To the left

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