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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define covariance in your own words.
💡 Hint: Think about how variables interact.
Question 2
Easy
What does a covariance of zero imply?
💡 Hint: Consider what happens when variables are unrelated.
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 does a negative covariance indicate?
- A direct relationship
- An inverse relationship
- No relationship
💡 Hint: Think about how variables may move in different directions.
Question 2
Is correlation always between -1 and 1?
- True
- False
💡 Hint: Consider the definitions of correlation.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given two datasets, A = {4, 5, 6} and B = {10, 20, 30}, calculate both covariance and correlation. What insights can you derive from the values?
💡 Hint: Remember to calculate means first and consider the relationship between data when deriving insights.
Question 2
If the correlation coefficient between two variables is -0.9, what does that imply about their relationship? Can you construct a hypothetical dataset that fits this correlation?
💡 Hint: Try sketching out the data points and observe how they trend together!
Challenge and get performance evaluation