find the equation of the least-squares regression line you would use for predicting y = sale price. (Give answers to three decimal places.)

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Based on your choice in Part (c), find the equation of the least-squares regression line you would use for predicting y = sale price. (Give answers to three decimal places.)

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**Industrial Property Analysis: Correlation and Prediction of Sale Prices**

The following data on sale price, size, and land-to-building ratio for 10 large industrial properties appeared in a paper.

**Table 1: Property Data**

| Property | Sale Price (millions of dollars) | Size (thousands of sq. ft.) | Land-to-Building Ratio |
|----------|---------------------------------|-----------------------------|------------------------|
| 1        | 10.5                            | 2167                        | 2.1                    |
| 2        | 2.6                             | 750                         | 3.4                    |
| 3        | 30.6                            | 2421                        | 3.7                    |
| 4        | 1.9                             | 223                         | 4.7                    |
| 5        | 20.1                            | 3916                        | 1.7                    |
| 6        | 8.1                             | 2865                        | 2.3                    |
| 7        | 10.2                            | 1699                        | 3.2                    |
| 8        | 6.6                             | 1047                        | 4.9                    |
| 9        | 5.7                             | 1107                        | 7.5                    |
| 10       | 4.4                             | 405                         | 17.3                   |

**Analysis:**

(a) **Calculate the value of the correlation coefficient between sale price and size.**

\[ r = 0.702 \]

(b) **Calculate the value of the correlation coefficient between sale price and land-to-building ratio.**

\[ r = -0.330 \]

(c) **If you wanted to predict sale price and you could use either size or land-to-building ratio as the basis for making predictions, which would you use?**

\[ \text{Size} \]

(d) **Based on your choice in Part (c), find the equation of the least-squares regression line you would use for predicting \(y = \text{sale price}\).**

Let the regression equation be:
\[ \hat{y} = b_0 + b_1 x \]

**Note:** Specific numerical values for \(b_0\) and \(b_1\) would need to be calculated using the provided data.
Transcribed Image Text:**Industrial Property Analysis: Correlation and Prediction of Sale Prices** The following data on sale price, size, and land-to-building ratio for 10 large industrial properties appeared in a paper. **Table 1: Property Data** | Property | Sale Price (millions of dollars) | Size (thousands of sq. ft.) | Land-to-Building Ratio | |----------|---------------------------------|-----------------------------|------------------------| | 1 | 10.5 | 2167 | 2.1 | | 2 | 2.6 | 750 | 3.4 | | 3 | 30.6 | 2421 | 3.7 | | 4 | 1.9 | 223 | 4.7 | | 5 | 20.1 | 3916 | 1.7 | | 6 | 8.1 | 2865 | 2.3 | | 7 | 10.2 | 1699 | 3.2 | | 8 | 6.6 | 1047 | 4.9 | | 9 | 5.7 | 1107 | 7.5 | | 10 | 4.4 | 405 | 17.3 | **Analysis:** (a) **Calculate the value of the correlation coefficient between sale price and size.** \[ r = 0.702 \] (b) **Calculate the value of the correlation coefficient between sale price and land-to-building ratio.** \[ r = -0.330 \] (c) **If you wanted to predict sale price and you could use either size or land-to-building ratio as the basis for making predictions, which would you use?** \[ \text{Size} \] (d) **Based on your choice in Part (c), find the equation of the least-squares regression line you would use for predicting \(y = \text{sale price}\).** Let the regression equation be: \[ \hat{y} = b_0 + b_1 x \] **Note:** Specific numerical values for \(b_0\) and \(b_1\) would need to be calculated using the provided data.
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