Suppose you fit the interaction model y = 0 + 1x1 + 2x2 + 3x1x2 +
Question:
y = β0 + β1x1 + β2x2 + β3x1x2 + ε
to n = 32 data points and obtain the following results:
SSyy = 479SSE = 213 = 10s3 = 4
a. Find R2 and interpret its value.
b. Is the model adequate for predicting y? Test at α = .05.
c. Use a graph to explain the contribution of the x1 x2 term to the model.
d. Is there evidence that x1 and x2 interact? Test at α = .05.
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a b R 1 SSESSyy121479 956 956 of the total variability of the y values is explained by this model To ...View the full answer
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Related Book For
Statistics For Business And Economics
ISBN: 9780321826237
12th Edition
Authors: James T. McClave, P. George Benson, Terry T Sincich
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