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Pearson's r

Computing Pearson's r

Answers


  1. Compute the correlation of the two variables. \(\mathrm{0.4686}\)

  2. The mean is \(\mathrm{5}\). The deviation score is \(\mathrm{6-4=2}\).

  3. Small letters refer to deviation scores. Multiply the deviation score for each \(\mathrm{x}\) value by the corresponding deviation score for each \(\mathrm{y}\) value. Then add these values together. \(\mathrm{(-2)(0) + (0)(-1) + (2)(1) = 2}\)

  4. The correlation will not change. Since the scores are converted to deviation scores, adding \(\mathrm{12}\) will have no effect.