Correlation coefficient
1-A sample of 12 houses that were sold last week in San Juan is selected.
Can we conclude that, as the size of the house (reported in thousands of square feet in the table below) increases, so does the sale price.
The following table in thousands of square feet), the selling price (reported in thousands of dollars) also increases?
| size of the house (thousands of sq. ft.) | sales price (thousands of dollars)
|
size of the house (thousands of sq. ft.) | sales price (thousands of dollars)
|
| 1.4 | 100 | 1.3 | 110 |
| 1.3 | 110 | 0.8 | 85 |
| 1.2 | 105 | 1.2 | 105 |
| 1.1 | 120 | 0.9 | 75 |
| 1.4 | 80 | 1.1 | 70 |
| 1.0 | 105 | 1.1 | 95 |
Calculate the correlation coefficient.
Calculate the coefficient of determination.
Determine the regression equation.
Is there a positive association between the size of the house and its selling price?
Use the 0.05 significance.
Calculate the coefficient of determination. Determine the regression equation. Is there a positive association between the size of the house and its selling price?
