Suppose you fit the first-order multiple regression model y = b0 + b1x1 + b2x2 + e
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Suppose you fit the first-order multiple regression model y = b0 + b1x1 + b2x2 + e to n = 25 data points and obtain the prediction equation yn = 6.4 + 3.1x1 + .92x2 The estimated standard deviations of the sampling distributions of bn 1 and bn 2 are 2.3 and .27, respectively.
a. Test H0: b1 = 0 against Ha: b1 7 0. Use a = .05.
b. Test H0: b2 = 0 against Ha: b2 ≠ 0. Use a = .05.
c. Find a 90% confidence interval for b1. Interpret the interval.
d. Find a 99% confidence interval for b2. Interpret the interval.
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Related Book For 
Statistics For Business And Economics
ISBN: 9781292413396
14th Global Edition
Authors: James McClave, P. Benson, Terry Sincich
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