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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define variance in your own words.
💡 Hint: Think about the average and how each number relates to it.
Question 2
Easy
What does a low variance indicate about a dataset?
💡 Hint: Consider how tightly packed the values are.
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 higher variance indicate about a dataset?
- More consistent values
- More spread out values
- Equal values
💡 Hint: Consider what happens to the spread of values if they are all similar.
Question 2
True or False: High variance is always desirable in engineering.
- True
- False
💡 Hint: Think about reliability in engineering processes.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A factory produces metal rods that are supposed to be 5 cm in length. During testing, a sample produced lengths of {4.8, 5.1, 5.0, 4.9, 5.2} cm. Calculate the variance.
💡 Hint: Calculate the mean, then find the squared differences from the mean.
Question 2
Analyze a given set of data points {1, 2, 3, 4, 5} and discuss how variance can impact product decisions in an engineering design.
💡 Hint: Consider how this spread affects reliability and consistency.
Challenge and get performance evaluation