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 = 2. If the regression equation is 6.00 ? 0.4(x), what is the 95% confidence interval for y? when x = 6?
a. [?4.75, ?2.55]
b. [2.49, 4.71]
c. [?0.66,7.86]
d. [?1.19, 0.39]
Ans: B
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