Lesson 2e.01

2e.01 Know and apply vocabulary of correlation: positive, negative, zero, causation,... Quiz: Pearson Edexcel Statistics, Unit 2

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 2e.01, Know and apply vocabulary of correlation: positive, negative, zero, causation,...: 20 multiple choice questions for the Pearson Edexcel GCSE Statistics (1ST0), Unit 2: Processing, representing and analysing data, written with Revision Ninja.

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The 20 questions

  1. What happens to the second variable in positive correlation as the first increases?

    • Remains constant
    • Tends to decrease
    • Tends to increase
    • Drops to zero

  2. What does a zero correlation coefficient indicate about two variables?

    • Direct causation
    • No linear relationship
    • Inverse proportion
    • Perfect curve

  3. What happens to the second variable in negative correlation as the first increases?

    • Tends to increase
    • Tends to decrease
    • Fluctuates wildly
    • Stays unchanged

  4. On a scatter diagram, the dependent variable is plotted on which axis?

    • The x-axis
    • Either axis
    • The y-axis
    • A diagonal line

  5. What is meant by interpolation on a scatter graph?

    • Finding the mode
    • Estimating outside data
    • Calculating the mean
    • Estimating inside data

  6. What primary risk is associated with using extrapolation on a scatter diagram?

    • Reversing axis directions
    • Calculating the mean point
    • Interpolating missing values
    • Estimating beyond observed data

  7. Which word describes a relationship in which two variables are linked, but causation is not established?

    • Association
    • Equivalence
    • Distribution
    • Identity

  8. Which axis should the dependent variable be plotted on in a scatter diagram?

    • z-axis
    • origin
    • x-axis
    • y-axis

  9. Which axis is the independent variable usually plotted on?

    • The y-axis
    • The key
    • The x-axis
    • The title

  10. A scatter plot shows points forming a downward slope. What is the correlation?

    • Perfect causal
    • Negative
    • Zero
    • Positive

  11. Which term is least connected to correlation vocabulary?

    • Histogram width
    • Association
    • Positive correlation
    • Causation

  12. Points scattered randomly with no clear pattern show what?

    • Zero correlation
    • Strong positive correlation
    • Strong negative correlation
    • Perfect correlation

  13. What type of correlation does an upward trend on a scatter diagram show?

    • Spurious correlation
    • Zero correlation
    • Positive correlation
    • Negative correlation

  14. A line of best fit predicts a value at x = 2, where the data run from x = 0 to x = 10. What type of prediction is this?

    • Correlation
    • Interpolation
    • Extrapolation
    • Causation

  15. A line of best fit predicts a value at x = 50, where the data cover x = 0 to 10. What type of prediction is this?

    • Extrapolation
    • A mode
    • Interpolation
    • A median

  16. What is the variable called that responds to changes in another variable?

    • Control variable
    • Independent variable
    • Extraneous variable
    • Dependent variable

  17. What does a correlation coefficient of zero imply?

    • No linear association
    • Perfect correlation
    • Strong negative correlation
    • Causation present

  18. Points lying very close to a straight line sloping upward indicate what?

    • Strong positive correlation
    • Strong negative correlation
    • Weak positive correlation
    • Zero correlation

  19. A scatter diagram has points spread across x from 3 to 9. Which prediction would be interpolation?

    • Estimating y at x = 5
    • Estimating y at x = -3
    • Estimating y at x = 0
    • Estimating y at x = 12

  20. What does claiming a statistical association between two variables minimally mean?

    • They have zero correlation
    • They share identical means
    • One causes the other
    • They vary together

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