DA0-002 Data Analysis Practice Question
In an A/B test, the null hypothesis states that there is no difference between the conversion rates of the control and treatment groups. After collecting data, the p-value is 0.03. Using a significance level α = 0.05, what should the analyst conclude?
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
✓
Reject the null hypothesis; there is a significant difference
Since the p-value (0.03) is less than α (0.05), the null hypothesis is rejected, indicating a statistically significant difference between the 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.
- ✓
Reject the null hypothesis; there is a significant difference
Why this is correct
Correct conclusion.
- ✗
Accept the alternative hypothesis; the treatment is better
Why it's wrong here
We can reject null but not necessarily accept alternative without considering direction.
- ✗
The test is inconclusive
Why it's wrong here
p is less than α, so result is significant.
- ✗
Fail to reject the null hypothesis; no significant difference
Why it's wrong here
p < α, so reject null.
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