DA0-001 Question #21: Real Exam Question with Answer & Explanation

Question

An e-commerce company recently tested a new website layout. The website was tested by a test 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?

Options

• AIn Germany, the increase in conversion from the new layout was not significant.
• BIn France, the increase in conversion from the new layout was not significant.
• CIn general, users who visit the new website are more likely to make a purchase.
• DThe new layout has the lowest conversion rates in the United Kingdom.

Explanation

In Germany, the increase in conversion from the new layout was not significant. This conclusion is accurate because the p-value for Germany is 0.13, which is higher than the commonly used significance level of 0.05. A p-value of 0.13 means that there is a 13% chance that the increase in conversion from the new layout was due to random chance, and therefore, the increase is not considered statistically significant. This means that we cannot reject the null hypothesis that the new layout does not have any effect on the conversion rate in Germany. In contrast, the p-values for the United States, France, and Canada are lower than 0.05, meaning that the increase in conversion from the new layout in these countries is considered statistically significant. So, we can conclude that users who visit the new website are more likely to make a purchase in these countries.

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