Certified Professional Category Analyst (CPCA) Practice Questions 2025 – All-In-One Guide to Exam Success

The proper procedure for analyzing in-store test results involves calculating the change in sales between the pre-test period and the test period for both groups and then making a comparison. This approach allows for a clear evaluation of the impact of the test on sales by establishing a baseline (the pre-test period) and measuring any changes that occur during the test period.

By comparing the sales changes for both groups, it is possible to determine not only if there was an increase or decrease in sales but also to evaluate the effectiveness of the tested changes relative to the controlled group—providing more actionable insights into the effects of the test. This method accounts for external variables that may influence sales, ensuring a more accurate analysis of the test’s outcomes against a stable reference period.

Calculating sales totals only during the test period lacks context for assessing the impact of the test, as it does not consider performance before the changes were implemented. Similarly, measuring changes for all stores without distinguishing between test and control groups dilutes the specific analysis focused on evaluating the test's performance. Finally, selecting a few representative stores without a rigorous comparison design might not capture the full picture of sales changes across all participating stores, which could lead to biased or incomplete conclusions.