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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does a positive covariance indicate?
💡 Hint: Think about how two variables can move together.
Question 2
Easy
Is correlation a dimensionless value?
💡 Hint: Consider the range of correlation values.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the range of values of correlation?
- -1 to 1
- -∞ to ∞
- 0 to 1
💡 Hint: Think about how correlation is measured and the meaning of its extremes.
Question 2
True or False: Covariance can be a negative number.
- True
- False
💡 Hint: Recall how covariance describes variable interactions.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A dataset comprises the following observations for two variables: A = {10, 20, 30, 40} and B = {5, 10, 15, 20}. Calculate the covariance and the correlation between A and B.
💡 Hint: Apply the covariance and correlation formulas carefully, ensuring to calculate means first.
Question 2
How might covariance apply differently when analyzing stock returns of two companies versus analyzing temperature variation and ice cream sales?
💡 Hint: Reflect on real-life implications of variable relationships.
Challenge and get performance evaluation