Free COMPTIA Data+ DA0-001 Actual Exam Questions - Question 5 Discussion
group of customers, and an old website was presented to a control group. The table below shows the
percentage of users in each group who made purchases on the websites:
Which of the following conclusions is accurate at a 95% confidence interval?
It’s A. The table shows Germany’s conversion rate barely changed between old and new layouts, so that increase isn’t statistically significant at 95%. France and the overall numbers seem to have clearer improvements, so B and C don’t fit as well. Also, D is off because the UK’s new layout conversion isn’t the lowest compared to the others. Focusing on Germany makes the most sense for this question about significance.
A/D? The question is about significance at 95%, and from the table, Germany’s increase is minimal, so A feels right. D says UK has the lowest rates with the new layout, but looking closely, UK’s rates don’t seem the lowest overall. So I’d rule out D. The overall trend (C) is tempting but without exact stats, hard to confirm significance generally. A seems safest if we focus on where no significant change happened.
It’s C. The overall trend shows higher purchase rates with the new layout, which matches the idea that the new site boosts conversions generally, not just in specific countries.
It’s A, the Germany change is barely noticeable compared to others.
Not B, because the increase in France looks quite marked. The overall results suggest a real improvement, so C fits better with the data shown.
It’s A. The increase in Germany looks small and might not be significant, unlike France or overall results where the new layout clearly did better. D is wrong since UK rates went up with the new layout.
Can someone confirm if the sample sizes for each country were the same? That info seems missing, and it could affect significance conclusions. Option C looks plausible but needs that detail.