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botanist gathered data about the number of pine, oak, and birch trees found in local parks. He used a graphing tool to organize \( h \), ata in different scatter plots and found the following lines of best fit: - The relationship between the numbers of pine trees, \( x \), and oak trees, \( y \), is modeled by the equation \( y=0.92 x+2.14 \), and the comelation coefficient for the data is 0.664 . - The relationship between the numbers of birch trees, \( x \), and oak trees, \( y \), is modeled by the equation \( y=0.73 x+1.13 \), and the correlation coefficient for the data is 0.939 . - The relationship between the numbers of birch trees, \( x \), and pine trees, \( y \), is modeled by the equation \( y=0.88 x+5.12 \), and the correlation coefficient for the data is 0.813 . Which line of best fit can the botanist expect to produce the most reliable predictions? the line modeling the numbers of pine trees and oak trees the line modeling the numbers of birch trees and oak trees the line modeling the numbers of birch trees and pine trees All three lines will give equally reliable predictions.

Ask by Reed Bond. in the United States
Jan 23,2025

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Answer

The line modeling the number of birch trees and oak trees provides the most reliable predictions.

Solution

To determine which line of best fit provides the most reliable predictions, we can examine the **correlation coefficients** for each relationship. The correlation coefficient (\( r \)) measures the strength and direction of a linear relationship between two variables, with values ranging from -1 to 1. A value closer to 1 or -1 indicates a stronger linear relationship, while a value near 0 suggests a weak or no linear relationship. Here are the given correlation coefficients: 1. **Pine vs. Oak Trees:** \( r = 0.664 \) 2. **Birch vs. Oak Trees:** \( r = 0.939 \) 3. **Birch vs. Pine Trees:** \( r = 0.813 \) **Analysis:** - **Birch vs. Oak Trees** has the highest correlation coefficient (\( r = 0.939 \)), indicating a very strong positive linear relationship. - **Birch vs. Pine Trees** also has a strong correlation (\( r = 0.813 \)), but it's not as strong as the Birch vs. Oak relationship. - **Pine vs. Oak Trees** has the lowest correlation (\( r = 0.664 \)), suggesting a moderate linear relationship. **Conclusion:** The higher the correlation coefficient, the more reliable the predictions based on the line of best fit. Therefore, the botanist can expect the most reliable predictions from the line modeling the **number of birch trees and oak trees**. **Answer:** the line modeling the numbers of birch trees and oak trees

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The Deep Dive

The relationship between the numbers of birch trees and oak trees has the highest correlation coefficient of 0.939. This value indicates a strong linear relationship, making the predictions derived from this line the most reliable. When you're swimming in a sea of trees, it's the birch-oak combo that keeps your boat afloat! While correlation coefficients provide valuable insights, it's important to remember that they don't imply causation. So, while the birch-oak line shines in prediction reliability, other external factors may influence tree populations. Trees may not be gossiping, but wind patterns or soil conditions might influence their growth!

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