Scatter diagrams (Edexcel GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
What are scatter diagrams used for?
What are scatter diagrams used for?
To investigate relationships and associations between two variables.
What is the explanatory variable?
What is the explanatory variable?
The variable controlled or changed; on the x-axis.
What is the response variable?
What is the response variable?
The variable that responds; on the y-axis.
Where should the explanatory variable be plotted?
Where should the explanatory variable be plotted?
On the horizontal (x) axis.
How do you interpret a strong association in a scatter diagram?
How do you interpret a strong association in a scatter diagram?
Points lie close to a straight line, indicating close relation.
What indicates no association in a scatter diagram?
What indicates no association in a scatter diagram?
Points are scattered randomly without clear pattern.
What should you do before interpreting a scatter diagram?
What should you do before interpreting a scatter diagram?
Label axes, choose scales, plot points carefully.
What pattern suggests a positive correlation?
What pattern suggests a positive correlation?
Points roughly follow an upward straight line.
What pattern suggests a negative correlation?
What pattern suggests a negative correlation?
Points roughly follow a downward straight line.
What are the key points for effective scatter diagram interpretation?
What are the key points for effective scatter diagram interpretation?
Label axes clearly, use appropriate scales, look at overall pattern.