Practise MYP Extended Mathematics questions on 9.2 Correlation and review the explanations to check your understanding.
Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.
True or False: If the Pearson correlation coefficient between two variables is , it guarantees that there is no relationship of any kind between the variables.
True or False: If , all the points in the scatter plot lie exactly on a straight line with a negative gradient.
Which of the following is NOT a required step in the organized workflow for computing from a table of paired values as described in the text?
Because it is standardized by dividing the covariance by the standard deviations of both variables.
Why is the Pearson correlation coefficient described as 'unit-free'?
Which of the following scenarios describes a 'third variable' explanation for correlation?
True
False
Computing the standard deviations and
Calculating the median of the and values
Computing the means and
Finding the sum of the products
True
False
