In a multiple regression with 40 observations, the following sample regression equation is obtained: = 12.8
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In a multiple regression with 40 observations, the following sample regression equation is obtained: ŷ = 12.8 + 2.6x1 −
1 .2x2 with se = 5.84. Also, when x1 equals 15 and x2 equals 6, se(ŷ0) = 2.20.
a. Construct a 95% confidence interval for E(y ) if x1 equals 15 and x2 equals 6.
b. Construct a 95% prediction interval for y if x1 equals 15 and x2 equals 6.
c. Which interval is wider? Explain.
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Related Book For
Business Statistics Communicating With Numbers
ISBN: 9780071317610
1st Edition
Authors: Kelly Jaggia
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