6.3.5.3 - Case 3: Repeated Ranks
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Practice Questions
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What does a positive correlation indicate?
💡 Hint: Think of two variables that increase together.
What is the range of Pearson's correlation coefficient?
💡 Hint: Consider the extremes of the measurement.
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Interactive Quizzes
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What does a correlation coefficient of 1 mean?
💡 Hint: Recall how correlations range.
True or False: Correlation implies causation.
💡 Hint: Think about examples where correlation appears yet no causation exists.
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Challenge Problems
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Two statistics classes were surveyed about their study hours and exam scores. Analyze the data and determine the correlation between study hours and exam scores.
💡 Hint: Remember to find the means, deviations, and then apply the correlation formula.
In a real-world scenario, gather data on local rainfall and crop yields. Analyze the data for correlation.
💡 Hint: Consider external factors that might influence crop yields apart from rainfall.
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