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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does a covariance of 0 indicate about the relationship between two variables?
💡 Hint: Think about relationships in terms of direction.
Question 2
Easy
Define correlation in your own words.
💡 Hint: Recall that it ranges from -1 to 1.
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 for the correlation coefficient?
- -1 to 1
- 0 to 1
- -∞ to ∞
💡 Hint: Recall the properties of correlation.
Question 2
True or False: A covariance of 5 indicates a strong positive relationship between two variables.
- True
- False
💡 Hint: Think about what covariance actually tells us.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have two datasets of daily temperatures and ice cream sales. The temperature dataset is X = {70, 75, 80, 85} and the sales dataset is Y = {200, 220, 240, 260}. Calculate the covariance and correlation. Discuss what this indicates about the relationship.
💡 Hint: Follow the steps of calculating means and then apply covariance and correlation formulas.
Question 2
Create a scenario where two variables might show high covariance but low correlation. Explain the conditions.
💡 Hint: Think about how outliers can affect linear relationships.
Challenge and get performance evaluation