a. What is the value of the slope of the least-squares regression line for these data? Round your answer to at least two decimal places. b. What is the value of the y-intercept of the least-squares regression line for these data? Round your answer to at least two decimal places.
Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per one thousand people in the population and the female life expectancy y (in years) are given.
| Birthrate, x (number of births per 1000 pop.) |
Female life expectancy, y (in years) |
|---|---|
| 49.3 | 62.5 |
| 27.8 | 72.3 |
| 34.3 | 67.8 |
| 50.3 | 54.1 |
| 39.8 | 65.4 |
| 17.5 | 73.6 |
| 31.2 | 62.2 |
| 14.2 | 77.0 |
| 51.2 | 60.3 |
| 46.2 | 57.0 |
| 24.4 | 74.3 |
| 14.0 | 72.8 |
The value of the sample
a. What is the value of the slope of the least-squares regression line for these data? Round your answer to at least two decimal places.
b. What is the value of the y-intercept of the least-squares regression line for these data? Round your answer to at least two decimal places.
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