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(a) Draw a scatter diagram of these data. Does a straight-line relationship seem plausible? (b) Fit a simple linear regression model to these data. (c) Test for significance of regression using a = 0.05. What is

(a) Draw a scatter diagram of these data. Does a straight-line relationship seem plausible? (b) Fit a simple linear regression model to these data. (c) Test for significance of regression using a = 0.05. What is

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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by using r-studio  answer all parts a-f 

Dollars 4.70 4.00 4.59 4.70 4.65 4.19 4.69 3.95 kWh 2.59 2.61 2.66 2.58 2.32 2.31 2.52 2.32 Dollars 4.01 4.31 4.51 4.46 4.55 4.14 4.25 kWh 2.65 2.64 2.38 2.41 2.35 2.55 2.34 (a) Draw a scatter diagram of these data. Does a straight-line relationship seem plausible? (b) Fit a simple linear regression model to these data. (c) Test for significance of regression using a = 0.05. What is the P-value for this test? (d) Find a 95% CI estimate on the slope. (e) Test the hypothesis Ho: B₁ = 0 versus H₁: B, 0 using x = 0.05. What conclusion can you draw about the slope coefficient? (f) Test the hypothesis H₁: B, 0 versus H₁: B, 0 using x = 0.05. What conclusions can you draw about the best model?
Transcribed Image Text:Dollars 4.70 4.00 4.59 4.70 4.65 4.19 4.69 3.95 kWh 2.59 2.61 2.66 2.58 2.32 2.31 2.52 2.32 Dollars 4.01 4.31 4.51 4.46 4.55 4.14 4.25 kWh 2.65 2.64 2.38 2.41 2.35 2.55 2.34 (a) Draw a scatter diagram of these data. Does a straight-line relationship seem plausible? (b) Fit a simple linear regression model to these data. (c) Test for significance of regression using a = 0.05. What is the P-value for this test? (d) Find a 95% CI estimate on the slope. (e) Test the hypothesis Ho: B₁ = 0 versus H₁: B, 0 using x = 0.05. What conclusion can you draw about the slope coefficient? (f) Test the hypothesis H₁: B, 0 versus H₁: B, 0 using x = 0.05. What conclusions can you draw about the best model?
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