A multiple regression equation computed from a sample of 21 scores is y ?=6+2(x_1)-3(x_2). The estimated standard error of estimate is 3.6, and the variances of x1 and x2 are 1.9 and 0.23, respectively. If the squared correlation between x1 and x2 is .32, then tobs associated with b1 is ______.
a. 0.98
b. –1.47
c. 2.82
d. –4.23
Ans: C
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