This animation is known as a Hypothetical Outcome Plot (HOP) which can be effective in communicating inferential uncertainty to an audience without statistical training. Such novel data visualisation methods are common in fields such as election forecasting and hurricane prediction, but quite underutilised in clinical trial reporting.

Webinar
Weather, Elections and Clinical Trials: Some novel approaches to visualizing uncertainty
Want to learn more? In this webinar, Steve Mallett, Senior Manager, Statistics at Veramed, Jan de Witt, Clinical Development Consultant, and Paolo Eusebi, Senior Consultant, Statistics and Psychometrics, IQVIA, explore some novel approaches to data visualization used in meteorology and election polling, and apply these to the results of a well-publicized clinical trial.