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Published byJustina Wilkinson Modified over 8 years ago
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1 Press Ctrl-A ©G Dear 2009 – Not to be sold/Free to use CorrelationCoefficient Stage 6 - Year 11 General Mathematics HSC
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2 Correlation Coefficient (1/2) 1.The scatter plot shows the quality of the relationship (correlation) between two variables. -0.75 -0.5 -0.25 0 0.25 0.5 0.75 1 Strong Positive Correlation Moderate Positive Correlation Weak Positive Correlation { No Correlation Weak Negative Correlation Moderate Negative Correlation Strong Negative Correlation 2.When one variable increases and the other variable increases then there is a positive correlation. 3.When one variable increases and the other variable decreases then there is a negative correlation. NOT 4.Strong correlation coefficients does NOT mean that one variable caused the other.
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3 Correlation Coefficient (2/2) 0.75 1 Strong Positive Correlation 1 Perfect Positive Correlation 0.5 0.75 Moderate Positive Correlation 0.25 0.5 Weak Positive Correlation -0.25 0.25 No Correlation -0.25 -0.5 Weak Negative Correlation -0.5 0.75 Moderate Negative Correlation -0.75 -1 Strong Negative Correlation - 1 Perfect Negative Correlation
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