Correlation | Maths | Quizalize & Oak National Academy

Starter quiz

Bivariate data has ______ variables that are together.
- 'two' ✓
Which type of graph can be used to display bivariate data by plotting coordinates on a grid?
- bar chart
- pictogram
- pie chart
- scatter graph ✓
Which variable is usually assigned to the horizontal axis of a scatter graph?
- dependent variable
- independent variable ✓
Which scatter graphs shows a case where as one variable increases the other variable also tends to increase?
In which graph does the line have a positive gradient?
The line in the graph has a ______ gradient.
- 'negative' ✓

The word ______ describes the extent to which the association is close to a linear association.
- 'correlation' ✓
A positive correlation suggests that as the independent variable increases, the dependent variable ______.
- decreases ✓
- increases
- stays the same
Which graph shows a negative correlation?
Which type of correlation best describes the data in the scatter graph?
- negative correlation
- no correlation ✓
- positive correlation
Which graph could be described as having an association/relationship which is not linear?
True or false? Correlation always implies that one variable is affecting the other.
- True
- False ✓

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Correlation always means that one of the variables is affecting the other variable.

Correlation only suggests variables may be related somehow. Show examples where variables correlate because they both depend on population.

Correlation - Correlation describes the extent to which the relationship is close to a linear relationship.