Practise MYP Extended Mathematics questions on 9.1 Covariance 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:
A researcher is studying the relationship between the number of hours spent studying () and exam scores (). If , , , and , calculate the covariance .
A dataset has a covariance of . This indicates that the sum of the products of deviations is dominated by points in which quadrants relative to the mean point?
0.00
-1.00
-0.25
0.25
Positive
Impossible to determine
Negative
Exactly zero
