Statics Interview Question:

The value of a correlation is reported by a researcher to be r = -0.5. Which of the following statements is correct?

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* a) The x-variable explains 25% of the variability in the y-variable.
* b) The x-variable explains 25% of the variability in the y-variable.
* c) The x-variable explains 50% of the variability in the y-variable.
* d) The x-variable explains 50% of the variability in the y-variable.

Answer - a
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