The Minitab output shown below was obtained by using paired data consisting of weights (in lb) of 33 cars and their highway fuel consumption amounts (in mi/gal). Along with the paired sample data, Minitab was also given a car weight of 4500 lb to be used for predicting the highway fuel consumption amount. Use the information provided in the display to determine the value of the linear correlation coefficient. (Be careful to correctly identify the sign of the correlation coefficient.) Given that there are 33 pairs of data, is there sufficient evidence to support a claim of linear correlation between the weights of cars and their highway fuel consumption amounts? Click the icon to view the Minitab display. The linear correlation coefficient is (Round to three decimal places as needed.) Minitab output The regression equation is Highway = 50.6-0.00504 Weight Predictor SE Coef P Coef 50.557 2.829 0.000 Weight -0.0050407 0.0007681 -7.53 0.000 T 17.78 Constant S=2.12761 R-Sq=64.3% Predicted Values for New Observations New Obs 1 Fit 27.874 R-Sq(adj) = 61.9% SE Fit 0.471 Weight 4500 95% CI (26.869, 28.879) Values of Predictors for New Observations New Obs 1 95% PI (23.279, 32.469) X

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**Minitab Output Analysis**

The Minitab output shown was obtained by using paired data consisting of weights (in pounds) from 33 cars and their highway fuel consumption (in miles per gallon). Along with the paired sample data, Minitab was given a car weight of 4500 lb as a predictor for highway fuel consumption.

**Regression Equation:**
The regression equation provided is:
\[ \text{Highway} = 50.6 - 0.00504 \times \text{Weight} \]

**Regression Statistics:**
- **Predictor**: This includes both the constant term and the weight variable.
- **Coefficient (Coef)**: 
  - Constant: 50.557
  - Weight: -0.0050407

- **Standard Error of the Coefficient (SE Coef)**: 
  - Constant: 2.829
  - Weight: 0.0007681

- **T-Value (T)**: 
  - Constant: 17.78
  - Weight: -7.53

- **P-Value (P)**: 
  - Constant: 0.000
  - Weight: 0.000

  Both P-values indicate the coefficients are statistically significant.

**Model Summary:**
- **S (Standard Error)**: 2.12761
- **R-Squared (R-Sq)**: 64.3%
- **Adjusted R-Squared (R-Sq adj)**: 61.9%

**Predicted Values for New Observations:**
- For a car weight of 4500 lb, the predicted highway fuel consumption is 27.874 mpg.
- **Standard Error of the Fit (SE Fit)**: 0.471
- **95% Confidence Interval (CI)**: (26.869, 28.879)
- **95% Prediction Interval (PI)**: (23.279, 32.469)

**Conclusion:**
The R-squared value of 64.3% suggests that approximately 64% of the variability in highway fuel consumption can be explained by the weight of the car. The negative coefficient for weight indicates an inverse relationship, meaning as the weight of the car increases, the highway fuel consumption decreases.

**Task:**
Determine the linear correlation coefficient and round to three decimal places as needed. This will quantify the strength and direction of the linear relationship.
Transcribed Image Text:**Minitab Output Analysis** The Minitab output shown was obtained by using paired data consisting of weights (in pounds) from 33 cars and their highway fuel consumption (in miles per gallon). Along with the paired sample data, Minitab was given a car weight of 4500 lb as a predictor for highway fuel consumption. **Regression Equation:** The regression equation provided is: \[ \text{Highway} = 50.6 - 0.00504 \times \text{Weight} \] **Regression Statistics:** - **Predictor**: This includes both the constant term and the weight variable. - **Coefficient (Coef)**: - Constant: 50.557 - Weight: -0.0050407 - **Standard Error of the Coefficient (SE Coef)**: - Constant: 2.829 - Weight: 0.0007681 - **T-Value (T)**: - Constant: 17.78 - Weight: -7.53 - **P-Value (P)**: - Constant: 0.000 - Weight: 0.000 Both P-values indicate the coefficients are statistically significant. **Model Summary:** - **S (Standard Error)**: 2.12761 - **R-Squared (R-Sq)**: 64.3% - **Adjusted R-Squared (R-Sq adj)**: 61.9% **Predicted Values for New Observations:** - For a car weight of 4500 lb, the predicted highway fuel consumption is 27.874 mpg. - **Standard Error of the Fit (SE Fit)**: 0.471 - **95% Confidence Interval (CI)**: (26.869, 28.879) - **95% Prediction Interval (PI)**: (23.279, 32.469) **Conclusion:** The R-squared value of 64.3% suggests that approximately 64% of the variability in highway fuel consumption can be explained by the weight of the car. The negative coefficient for weight indicates an inverse relationship, meaning as the weight of the car increases, the highway fuel consumption decreases. **Task:** Determine the linear correlation coefficient and round to three decimal places as needed. This will quantify the strength and direction of the linear relationship.
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