In the Huge Savings ad variation test, what did the blue asterisk indicate?

• A. The increase in clicks was statistically significant at a 99% confidence level
• B. The decrease in impressions was statistically significant at a 95% confidence level
• C. The test had fewer than 1000 impressions
• D. The overall conversion rate improved

Answer: (B)

The blue asterisk signals that the observed change is statistically significant. In A/B tests, symbols like an asterisk are used to flag results that are unlikely to be due to random variation. Here, the blue asterisk is tied to the metric for impressions and shows a significant decrease at the 95% confidence level. That means we can be about 95% confident that the drop in impressions isn’t just a fluke and reflects a real effect of the variation. It does not indicate significance for clicks, conversions, or different confidence levels, or imply any threshold like having fewer than 1000 impressions.