Spearman's rank correlation coefficient (AQA GCSE Statistics): Flashcards
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What does indicate about two variables?
What does indicate about two variables?
Strong positive correlation; both variables increase together.
What is the range of Spearman's rank correlation coefficient?
What is the range of Spearman's rank correlation coefficient?
The range is from -1 to +1 inclusive.
If , what can you say about the correlation?
If , what can you say about the correlation?
Moderate negative correlation; one variable decreases as the other increases.
How do you interpret in context?
How do you interpret in context?
No correlation; the variables are not related linearly.
What does a scatter plot with points scattered randomly suggest?
What does a scatter plot with points scattered randomly suggest?
Little or no correlation between the variables.
If , what is wrong with this value?
If , what is wrong with this value?
It's incorrect; must be between -1 and +1.
Describe the correlation if .
Describe the correlation if .
Strong negative correlation; one variable increases, the other decreases.
What does a tight cluster of points in a scatter plot indicate?
What does a tight cluster of points in a scatter plot indicate?
Stronger correlation between the two variables.
How do you explain in context?
How do you explain in context?
Weak positive correlation; slight tendency for both to increase.
What is a common mistake when interpreting correlation?
What is a common mistake when interpreting correlation?
Confusing strength with direction; is as strong as .