DA0-002 Data Analysis Practice Question
In simple linear regression, the coefficient of determination R² measures:
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The proportion of variance in the dependent variable explained by the independent variable
R² indicates the proportion of variance in the dependent variable explained by the independent variable.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The probability that the slope is zero
Why it's wrong here
This is the p-value for the slope.
- ✗
The slope of the regression line
Why it's wrong here
Slope is the coefficient, not R².
- ✓
The proportion of variance in the dependent variable explained by the independent variable
Why this is correct
Correct interpretation of R².
- ✗
The strength and direction of the linear relationship
Why it's wrong here
This describes Pearson's r.
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