6.3.1 - Karl Pearson’s Coefficient of Correlation
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Practice Questions
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Define correlation.
💡 Hint: Think about how two things relate to each other.
What does a positive correlation mean?
💡 Hint: Consider variables that typically rise together, like income and expenditure.
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Interactive Quizzes
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What is the range of Pearson's correlation coefficient?
💡 Hint: Visualize the graph showing extremes.
Are correlation and causation the same?
💡 Hint: Think of examples where two events occur together without cause.
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Challenge Problems
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Calculate the Karl Pearson’s coefficient for the following sets of data on the heights and weights of students: Heights (in cm) = [150, 160, 170, 180] and Weights (in kg) = [50, 60, 65, 70].
💡 Hint: Remember to standardize using the variance.
Discuss a case where correlation was mistaken for causation in marketing data and explain the consequences.
💡 Hint: Reflect on the importance of critical analysis of data before conclusions.
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