DA0-002 Data Analysis Practice Question
A logistic regression model is used to predict the probability of customer churn. The model's coefficient for the feature 'customer support calls' is 0.8 with a p-value of 0.001. Which interpretation is correct?
⚠ Common exam trap
DA0-002 often tests the confusion between log-odds coefficients and odds ratios — candidates must remember that the raw coefficient is in log-odds, and only e^β gives the multiplicative odds change.
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
✓
For each additional support call, the log-odds of churn increase by 0.8, and this effect is statistically significant.
In logistic regression, coefficients are expressed in log-odds units. A coefficient of 0.8 for 'customer support calls' means each additional call increases the log-odds of churn by 0.8, holding other predictors constant. The p-value of 0.001 is below the conventional 0.05 threshold, so the effect is statistically significant.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
For each additional support call, the log-odds of churn increase by 0.8, and this effect is statistically significant.
Why this is correct
In logistic regression, coefficients are expressed in log-odds, so a coefficient of 0.8 means each additional support call raises the log-odds of churn by 0.8. The p-value of 0.001, below the 0.05 threshold, confirms this effect is statistically significant rather than due to chance.
- ✗
The odds of churn are multiplied by 0.8 for each additional call.
Why it's wrong here
A coefficient of 0.8 means the log-odds increase by 0.8, so the odds are multiplied by e^0.8 ≈ 2.23, not 0.8. The 0.8 figure is tempting because it is the raw coefficient, but exponentiating is required to convert log-odds into an odds multiplier.
- ✗
Support calls have no significant effect on churn.
Why it's wrong here
A p-value of 0.001 is far below the conventional 0.05 threshold, so the support-calls coefficient is statistically significant. The claim of no effect is tempting when a coefficient appears small, but 0.8 is substantial and the tiny p-value confirms the relationship is unlikely to be chance.
- ✗
For each additional support call, the probability of churn increases by 80%.
Why it's wrong here
Logistic regression coefficients act on log-odds, not probability directly; 0.8 raises log-odds by 0.8, giving an odds ratio of about 2.23. The 80% reading is tempting because the coefficient looks like a percentage, but probability change depends on the baseline probability.
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Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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.