DA0-002 Data Analysis Practice Question
A data scientist runs a linear regression model to predict customer spending based on income. The R-squared value is 0.45 and the p-value for the slope coefficient is 0.03. At a significance level of α=0.05, which of the following conclusions is correct?
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 slope is statistically significant, and the model explains 45% of the variance.
The p-value (0.03) is less than α (0.05), so the slope is statistically significant. R²=0.45 means the model explains 45% of the variance.
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 slope is not statistically significant, and the model explains 55% of the variance.
Why it's wrong here
Both parts are incorrect.
- ✓
The slope is statistically significant, and the model explains 45% of the variance.
Why this is correct
Correct: p<0.05 indicates significance; R²=0.45 indicates explained variance.
- ✗
The slope is statistically significant, and the model explains 55% of the variance.
Why it's wrong here
R² is 0.45, not 0.55.
- ✗
The slope is not statistically significant, and the model explains 45% of the variance.
Why it's wrong here
Slope is significant because p < 0.05.
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Written by Johnson Ajibi, MSc IT Security
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This DA0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DA0-002 exam.