Statistics For Business And Economics Plus Mystatlab With Pearson Etext -- Access Card Package (13th Edition)

13th Edition

ISBN: 9780134648361

Author: James T. McClave, P. George Benson, Terry Sincich

Publisher: PEARSON

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Textbook Question

Chapter 12.3, Problem 12.4LM

Suppose you fit the first-order multiple regression model

y =β_{0 +} β₁ x_{1 +} β₂x_{2 +} ε

to n = 25 data points and obtain the prediction equation

y ^ = 6.4 + 3.1x₁ + .92x₂

The estimated standard deviations of the sampling distributions of β ^ ₁ and β ^ ₂ are 2.3 and .27, respectively.

a. Test H₀: (β₁ = 0 against H_a: β₁ > 0. Use α = .05.

b. Test H₀: (β₂ = 0 against H_a: β₂ ≠ 0. Use α = .05.

c. Find a 90% confidence interval for β₁. Interpret the interval.

d. Find a 99% confidence interval for β₂. Interpret the interval.

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Chapter 12.3, Problem 12.3LM

Chapter 12.3, Problem 12.5LM

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Chapter 12 Solutions

Statistics For Business And Economics Plus Mystatlab With Pearson Etext -- Access Card Package (13th Edition)

Ch. 12.3 - Write a first-order model relating E(y) to a. two...Ch. 12.3 - Minitab was used to fit the model E(y) = (0 + 1x1...Ch. 12.3 - Suppose you fit the multiple regression model y =0...Ch. 12.3 - Suppose you fit the first-order multiple...Ch. 12.3 - Prob. 12.5LM Ch. 12.3 - Prob. 12.6LM Ch. 12.3 - Prob. 12.7LM Ch. 12.3 - If the analysis of variance F-test leads to the...Ch. 12.3 - Ambiance of 5-star hotels. Although invisible and...Ch. 12.3 - Forecasting movie revenues with Twitter. Refer to...

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Solution Summary: The author explains that there is no sufficient evidence to conclude that beta_1>0 at alpha =0.05.

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