Dr.Garoule is trying to determine which of his patients has the highest likelihood of depression.He calculates a linear regression equation with the scores on an anxiety measure, which are positively correlated with scores on a scale measuring depression.Dr.Garoule converts patient D's anxiety score to a z score and predicts the z score for the depression scale to be 0.65.Is patient D's raw score for depression above or below the mean and why?
A) It is below the mean because the z score is negative.
B) It is above the mean because the z score is negative.
C) It is below the mean because the z score is positive.
D) It is above the mean because the z score is positive.

Question

Quizplus · Accepted Answer

A z score of 0.65 indicates that patient D's depression score is 0.65 standard deviations above the mean. Since z scores of 0 indicate the mean, positive z scores indicate scores above the mean, and negative z scores indicate scores below the mean, patient D's raw score for depression is above the mean. Therefore, the correct answer is D.

DrGaroule Is Trying to Determine Which of His Patients Has