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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for covariance?
💡 Hint: Consider the expected value and average deviations.
Question 2
Easy
What does a positive covariance indicate?
💡 Hint: Think about how two variables relate to each other.
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 possible range of covariance?
- -1 to 1
- 0 to 1
- -∞ to ∞
💡 Hint: Consider how variables can differ broadly.
Question 2
True or False: A correlation of 1 indicates a perfect negative correlation.
- True
- False
💡 Hint: Think about the direction of the relationship.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A dataset represents heights (in cm) of individuals: {150, 160, 170, 180}. Another dataset gives weights (in kg): {50, 60, 70, 80}. Calculate the covariance and correlation.
💡 Hint: Start by finding the averages and then apply the formulas.
Question 2
Discuss how correlation can be misleading in determining relationships, using an example from public health.
💡 Hint: Consider third variables that could influence the correlation.
Challenge and get performance evaluation