WHAT KIND OF STATISTICAL ANALYSES ARE MOST USEFUL? Statistical analyses can serve multiple purposes in usability testing. While it might be tempting to perform advanced statistical analyses to determine the signiƒcance of your test results, such analyses often add little value and can occasionally be counterproductive. In most cases, basic analyses, such as calculating averages, medians, and standard deviations, will generate sufƒcient insight into usability issues.