Attract and retain talent. In Excel 2010, the CONFIDENCE function has been replaced by the Confidence.Norm function. In this article, we learned what the CONFIDENCE function is about. . But to your surprise, it is one of the most commonly used statistical analysis tools of Excel! How to find significance level | Math Preparation 1 - He used the T-Test to monitor the quality of the stout brewed by Guinness. In short, it enables us to determine if the obtained results are the result of chance or show that the two things we are testing are unrelated. The standard deviation shows how different the actual data might be from the mean of a sample size. . First of all, we need to find the mean of this sample of six employees. Required fields are marked *. Test regression slope | Real Statistics Using Excel