Math Problem Statement
Solution
To solve this problem, we analyze the two scatterplots and the given answer choices.
- Plot A shows a clear nonlinear relationship; the points curve, indicating a parabolic shape, which is typical of a nonlinear relationship.
- Plot B shows a negative linear relationship, as the points appear to follow a downward sloping straight line.
Now, let's evaluate each option:
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Option A: Plot A indicates a nonlinear relationship between the variables.
- This is true since Plot A shows a curved (parabolic) pattern.
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Option B: Plot B indicates a linear relationship between the variables.
- This is true since Plot B shows points that follow a linear trend.
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Option C: The correlation coefficient for the data in Plot B is close to 1.
- This cannot be true. A correlation coefficient of 1 indicates a perfect positive linear relationship. However, Plot B shows a negative linear relationship, so the correlation should be close to -1, not 1.
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Option D: The correlation coefficient for the data in Plot A is close to 0.
- This is true. Since Plot A shows a nonlinear pattern, the correlation coefficient would not capture the relationship well and would likely be close to 0.
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Option E: The value of the least-squares regression line for Plot B is greater than the value of the least-squares regression line for Plot A.
- This is true. Plot B follows a strong linear trend, so the value would be high, while Plot A's value would be lower due to its nonlinear pattern.
Thus, the statement that cannot be true is Option C: The correlation coefficient for the data in Plot B is close to 1.
Would you like more details on the concepts of correlation and values?
Here are 5 related questions for deeper understanding:
- What is the difference between correlation and in data analysis?
- How is the correlation coefficient calculated, and what are its typical ranges?
- Can a nonlinear relationship ever have a high value? If so, under what conditions?
- What are some methods for detecting nonlinear relationships in scatterplots?
- How does the least-squares regression line differ between linear and nonlinear models?
Tip: In scatterplot analysis, the correlation coefficient reflects the strength and direction of a linear relationship, while the value measures the proportion of variance explained by a model, which can apply to both linear and nonlinear fits.
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Math Problem Analysis
Mathematical Concepts
Statistics
Correlation
Scatterplots
Linear Relationships
Nonlinear Relationships
r-squared value
Formulas
Correlation coefficient (r)
r^2 value
Theorems
Least-squares regression line
Suitable Grade Level
Grades 9-12