Practice - Introduction
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Practice Questions
Test your understanding with targeted questions
What is the formula for calculating the mean?
💡 Hint: Think about the average of a set of numbers.
What does a standard deviation of zero imply?
💡 Hint: Consider what it means for data points to be the same.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does variance measure?
💡 Hint: Think about why we care about how spread out a dataset is.
Is standard deviation always a positive number?
💡 Hint: Consider how the standard deviation is calculated.
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Challenge Problems
Push your limits with advanced challenges
Given the test scores of five students: 65, 70, 75, 80, and 85, calculate the variance and standard deviation.
💡 Hint: Use the formula for variance with these scores after finding the mean.
A dataset has the following ages: 10, 20, 30, 40, 50. Calculate the population variance and standard deviation.
💡 Hint: Remember to use N for population calculations.
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Reference links
Supplementary resources to enhance your learning experience.