A developmental psychologist obtained a random sample of 28 Psychology students and had each student rate his or her mother’s warmth on a ten-point scale (x), and then assessed each student’s level of anxiety using the Beck Anxiety Inventory (y). The mean and standard deviation of x were mx = 5 and sx = 1, respectively, and the estimated standard error of estimate was sest = 1.77. If the regression equation is 8.35 ? 0.67(x), what is the estimated standard error of y? when x = 6.5?
a. 0.53
b. 0.61
c. 0.35
d. 2.68
Ans: B
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