Estimation of Correlation Coefficient (Leaving Cert Mathematics): Quizzes

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Estimation of Correlation Coefficient
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13 questions from this quiz

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What does the correlation coefficient rr measure?

Strength & direction of linear relationship

What is the range of values for the correlation coefficient rr?

−1-1 to +1+1

What does r=+1r = +1 indicate?

Perfect positive linear relationship

What does r=−1r = -1 indicate?

Perfect negative linear relationship

What does r=0r = 0 indicate?

No linear relationship

If scatter plot points form an upward-sloping line, what type of correlation is present?

Positive

If scatter plot points form a downward-sloping line, what type of correlation is present?

Negative

How do you identify a strong correlation from a scatter plot?

Points closely clustered around a line

If points are tightly aligned on a scatter plot, what is the approximate value of rr?

r≈±0.9r \approx \pm 0.9 or higher

If points show moderate spread on a scatter plot, what is the approximate value of rr?

r≈±0.5r \approx \pm 0.5

If points show significant scatter on a scatter plot, what is the approximate value of rr?

r≈±0.2r \approx \pm 0.2 or lower

Does correlation imply causation?

No

What effect can outliers have on the correlation coefficient?

Significantly affect it

Explore Leaving Cert Mathematics Revision Notes by Topics

The Basics

Graphing Data

Scatter Plots & Correlation

Analysing Data

Measures of Relative Standing

Frequency Distributions

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The Basics

Graphing Data

Scatter Plots & Correlation

Analysing Data

Measures of Relative Standing

Frequency Distributions

Explore Leaving Cert Mathematics Flashcards by Topics

The Basics

Graphing Data

Scatter Plots & Correlation

Analysing Data

Measures of Relative Standing

Frequency Distributions

Explore Leaving Cert Mathematics Exam Questions by Topics

The Basics

Graphing Data

Scatter Plots & Correlation

Analysing Data

Measures of Relative Standing

Frequency Distributions

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