DA0-002 Data Analysis Practice Question
An analyst compares average sales across three different store locations using a statistical test. Which test is most appropriate?
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
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ANOVA
ANOVA compares means across three or more groups.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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ANOVA
Why this is correct
ANOVA compares means across three or more independent groups on one continuous dependent variable, here average sales per store location. It tests whether at least one group mean differs, controlling family-wise error. A t-test suits only two groups, so ANOVA is the appropriate choice for three locations.
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t-test
Why it's wrong here
A t-test compares means between two groups only; three store locations require a one-way ANOVA to test whether any group means differ. The t-test is tempting because it handles mean comparison, but it suits exactly two samples, not three.
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Correlation analysis
Why it's wrong here
Correlation analysis measures the strength of linear association between two continuous variables, so it cannot compare means across three store groups. It is tempting because it also examines relationships between sales figures, and would be correct for testing whether advertising spend and revenue move together.
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Chi-square test
Why it's wrong here
A chi-square test compares observed and expected frequencies of categorical counts, not continuous means, so it cannot test average sales across locations. It is tempting because it also compares three or more groups, and would be correct for testing whether purchase category and store location are independent.
About these practice questions
Courseiva writes every DA0-002 question from scratch — 1,004 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.