Practise MYP Extended Mathematics questions on 9 Covariance and 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.
Calculate the covariance for the following four pairs of data: .
Consider a small data set with three pairs of observations: . Find the covariance of this data set.
If most points in a scatter plot lie in the Top Left Quadrant (TLQ) and the Bottom Right Quadrant (BRQ) relative to the mean point, the covariance will most likely be:
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: A scatter plot that has a very steep line of best fit will always have a correlation coefficient closer to 1 than a plot with a shallow line of best fit.
0.00
-1.00
-0.25
0.25
Positive
Impossible to determine
Negative
Exactly zero
True
False
True
False
