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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does variance measure?
💡 Hint: Think about how spread out the data is.
Question 2
Easy
What is the standard deviation in relationship to variance?
💡 Hint: Recall the formula connecting the two.
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
Variance provides insights into:
- Central tendency
- Data dispersion
- Data accuracy
💡 Hint: Think about what variance tells you about data.
Question 2
Standard deviation is the square root of:
- True
- False
💡 Hint: Consider how the concepts are connected.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have the following measurements of a mechanical component's diameter: 10.2, 10.4, 10.1, 10.3, 10.5. Calculate the variance and interpret what it means for quality control.
💡 Hint: Find the mean first and square deviations!
Question 2
You are analyzing the daily rainfall (in cm) over a month: 1.0, 2.2, 0, 1.5, 3.1, 0, 2.0, 1.8, 0.5, 1.0, 2.5, 0.3. Calculate variance. What does this tell you about the variability of rainfall?
💡 Hint: Remember to compute the mean rainfall first!
Challenge and get performance evaluation