Question

The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were measured for 10 students in a beginning computer-science course. The results were as follows. Calculate the estimated standard error of regression, s_b1. (Give your answer correct to two decimal places.)

x	4	16	20	13	22	21	15	20	19	16
y	20	18	23	35	26	25	26	29	18	26

Answer 1

SSE =Syy-(Sxy)2/Sxx=

242.041

	s2 =SSE/(n-2)=	30.2552
std error σ              =	=se =√s2=	5.5005

estimated std error of slope =se(β1) =s/√Sxx=0.3462 ~   0.35