Scatter Plots & Correlation (Leaving Cert Mathematics): Quizzes
📚Quizzes
Practise the questions
11 questions from this quiz
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Practise the questions
11 questions from this quiz
What is a key purpose of using scatter plots in statistics?
What is a key purpose of using scatter plots in statistics?
To determine if two variables are related
What does each point on a scatter plot represent?
What does each point on a scatter plot represent?
A pair of values for two variables
What is positive correlation?
What is positive correlation?
As one variable increases, the other increases
What happens in negative correlation?
What happens in negative correlation?
One increases, the other decreases
What indicates strong correlation on a scatter plot?
What indicates strong correlation on a scatter plot?
Points closely clustered around the line
What must a correct scale on a scatter plot do?
What must a correct scale on a scatter plot do?
Increase in equal steps
How should negative numbers appear on a scale?
How should negative numbers appear on a scale?
Decrease in value moving left or down
How should a line of best fit balance the data points?
How should a line of best fit balance the data points?
Same number above and below the line
What two key factors determine correlation?
What two key factors determine correlation?
Direction and strength
Must a line of best fit start at the origin?
Must a line of best fit start at the origin?
No, unless the data suggests it
What can you use a line of best fit for?
What can you use a line of best fit for?
Predict values not in original data