Practice - Measures of Dispersion (Optional)
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Practice Questions
Test your understanding with targeted questions
What is the range of the dataset 3, 7, 2, 9, 5?
💡 Hint: Look for the highest and lowest numbers.
Calculate the mean of the dataset 4, 8, 6.
💡 Hint: Add the numbers and divide by how many there are.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does range measure?
💡 Hint: Remember, it focuses on just the extremes of the dataset.
True or False: A small standard deviation means that the data points are closely clustered around the mean.
💡 Hint: Consider what it means if values are similar to each other.
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Challenge Problems
Push your limits with advanced challenges
A scientist records the heights of plants: 30 cm, 45 cm, 50 cm, 60 cm, 90 cm. Calculate the range and standard deviation. Discuss the implications of your findings.
💡 Hint: Calculate range first, then find the mean to determine the deviations.
Given the book sales over five weeks: 200, 400, 300, 500, 600, find the range and standard deviation, then analyze how consistent sales are.
💡 Hint: Identify key values and apply SD formula after finding the mean.
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Reference links
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