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True or False 1) A correlation coefficient based on a scatter plot measures the proportion of data...

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Basic Math

True or False

1) A correlation coefficient based on a scatter plot measuresthe proportion of data lying on the regression line.

2)Which of the following is/are incorrect statement(s) about thecorrelation between two quantitative variables ?X and ?Y?

I. A correlation of -0.8 indicates a stronger linear associationbetween X and Y than a correlation of 0.5.
II. A correlation of 0 implies ?X and ?Y are not related atall.
III. A correlation of -1 indicates that ?=−?Y=−X.

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