Galton introduced the idea of correlation (or co-relation) and showed which of the following to be true?

Question

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Correlations should only be used with variables that are normally distributed.

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A correlation of -1 indicates that there is no relationship between the two variables being considered.

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If variable A (e.g. height) shows a correlation with variable B (e.g. weight) of +10, then we know that A caused

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IQ was correlated with job performance.

Question #39266