(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
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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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