Based on the data shown below, calculate the regression line (each value to two decimal places) y = x+ y 3 40.36 4 35.98 35.6 6. 35.82 7 31.74 8. 29.86 9 29.98 10 26.8 11 24.92 12 24.94 13 23.26 14 22.18 15 21.6

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### Regression Line Calculation: A Step-by-Step Guide

Based on the data shown below, calculate the regression line (each value to two decimal places):

\[ y = \_\_\_\_\_\_ x + \_\_\_\_\_\_ \]

| \( x \) | \( y \)  |
|:------:|:--------:|
| 3      | 40.36    |
| 4      | 35.98    |
| 5      | 35.6     |
| 6      | 35.82    |
| 7      | 31.74    |
| 8      | 29.86    |
| 9      | 29.98    |
| 10     | 26.8     |
| 11     | 24.92    |
| 12     | 24.94    |
| 13     | 23.26    |
| 14     | 22.18    |
| 15     | 21.6     |

To find the regression line, follow these steps:

1. **Calculate the means \(\overline{x}\) and \(\overline{y}\)**.
2. **Find the slope \(b\)** using the formula:
   \[
   b = \frac{\sum{(x_i - \overline{x})(y_i - \overline{y})}}{\sum{(x_i - \overline{x})^2}}
   \]
3. **Calculate the intercept \(a\)** using the formula:
   \[
   a = \overline{y} - b\overline{x}
   \]

After performing these calculations, substitute the values of \(a\) and \(b\) into the linear equation \(y = bx + a\).

Ensure to round each value to two decimal places for precision.
Transcribed Image Text:### Regression Line Calculation: A Step-by-Step Guide Based on the data shown below, calculate the regression line (each value to two decimal places): \[ y = \_\_\_\_\_\_ x + \_\_\_\_\_\_ \] | \( x \) | \( y \) | |:------:|:--------:| | 3 | 40.36 | | 4 | 35.98 | | 5 | 35.6 | | 6 | 35.82 | | 7 | 31.74 | | 8 | 29.86 | | 9 | 29.98 | | 10 | 26.8 | | 11 | 24.92 | | 12 | 24.94 | | 13 | 23.26 | | 14 | 22.18 | | 15 | 21.6 | To find the regression line, follow these steps: 1. **Calculate the means \(\overline{x}\) and \(\overline{y}\)**. 2. **Find the slope \(b\)** using the formula: \[ b = \frac{\sum{(x_i - \overline{x})(y_i - \overline{y})}}{\sum{(x_i - \overline{x})^2}} \] 3. **Calculate the intercept \(a\)** using the formula: \[ a = \overline{y} - b\overline{x} \] After performing these calculations, substitute the values of \(a\) and \(b\) into the linear equation \(y = bx + a\). Ensure to round each value to two decimal places for precision.
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