Correlation (Edexcel GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
What does correlation describe between two variables?
What does correlation describe between two variables?
The pattern or relationship between two measurements.
What tool is primarily used to observe correlation?
What tool is primarily used to observe correlation?
Scatter diagram or scatter plot.
Describe strong positive correlation on a scatter diagram.
Describe strong positive correlation on a scatter diagram.
Points form a tight upward-sloping line.
How is no correlation shown on a scatter diagram?
How is no correlation shown on a scatter diagram?
Points scattered randomly with no pattern.
What signals strong negative correlation?
What signals strong negative correlation?
Points form a tight downward-sloping line.
When do you recognize non-linear correlation?
When do you recognize non-linear correlation?
When data shows a curved pattern, not straight.
What relationship exists between temperature and coat sales?
What relationship exists between temperature and coat sales?
Negative correlation; as temp rises, coat sales fall.
What should you mention when describing correlation?
What should you mention when describing correlation?
Strength (strong/weak) and direction (positive/negative).
What is an example of strong negative correlation?
What is an example of strong negative correlation?
Increasing TV hours with decreasing test scores.
How does non-linear correlation differ from linear?
How does non-linear correlation differ from linear?
Follow a curved, rather than straight, trend.