1b.03 Know and apply the terms explanatory (independent) variables and response (dependent)... Quiz: Pearson Edexcel Statistics, Unit 1

The 20 questions

1. Which variable is the explanatory (independent) variable in 'as temperature rises, ice cream sales increase'?

   • Neither variable
   • Ice cream sales
   • Both variables
   • Temperature

2. In the relationship 'study time affects test score', which variable is the response?

   • Test score
   • Study time
   • Student age
   • Revision guide

3. On a scatter diagram, where should the explanatory variable be plotted?

   • As the title
   • On the y-axis
   • On the x-axis
   • In a key

4. On a scatter diagram, which axis is used for the response variable?

   • The x-axis
   • The z-axis
   • The y-axis
   • The diagonal

5. Which term is another name for the explanatory variable?

   • Outcome variable
   • Dependent variable
   • Independent variable
   • Response variable

6. Which term is another name for the response variable?

   • Dependent variable
   • Explanatory variable
   • Control variable
   • Independent variable

7. In an experiment, the amount of fertiliser is changed and plant height is measured. Which is the response variable?

   • Number of plants
   • Type of soil
   • Plant height
   • Amount of fertiliser

8. In a study of revision hours and exam marks, what is the explanatory variable?

   • Test difficulty
   • Revision hours
   • Exam marks
   • Student grade

9. In a study linking exercise to resting heart rate, which is the explanatory variable?

   • Resting time
   • Amount of exercise
   • Heart rate
   • Blood pressure

10. Shoe size is compared with height, and height is believed to explain shoe size. Which variable goes on the x-axis?

    • Shoe size
    • Height
    • Frequency
    • Name of pupil

11. A dataset records rainfall (mm) and crop yield (tonnes). If rainfall is thought to affect yield, which is the response variable?

    • Time of year
    • Area of field
    • Crop yield
    • Rainfall

12. Which variable is typically the response variable in a road safety study?

    • Weather condition
    • Speed limit
    • Road width
    • Number of accidents

13. In a car value scatter diagram, where is the explanatory variable age plotted?

    • On the x-axis
    • On the y-axis
    • As the frequency
    • In the legend

14. What is the role of an explanatory variable in an investigation?

    • It acts as bias
    • It causes changes
    • It remains constant
    • It measures outcome

15. In the statement 'as distance from a town increases, house prices fall', what is house price?

    • Class interval
    • Response variable
    • Explanatory variable
    • Sampling frame

16. On a scatter diagram, which axis is used for the explanatory variable?

    • y-axis
    • Both axes
    • z-axis
    • x-axis

17. What does the explanatory variable represent in a bivariate analysis?

    • The response variable
    • The dependent variable
    • The independent variable
    • The random variable

18. If goals scored explain points gained, which is the response variable?

    • Both variables
    • Points gained
    • Goals scored
    • Neither variable

19. Which axis should display the response dependent variable on a scatter diagram?

    • y-axis
    • x-axis
    • Diagonal axis
    • Both axes

20. In a study of study time and exam score, what is the explanatory variable?

    • Exam score
    • Class size
    • Study time
    • School name

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