What does the level of confidence means?

The level of confidence refers to the degree of certainty or assurance that a particular outcome will occur or that a statistical estimate is accurate. In statistics, it often indicates the probability that a certain parameter lies within a specified interval, commonly expressed as a percentage (e.g., 95% confidence level). A higher level of confidence suggests greater reliability in the results, while a lower level indicates more uncertainty. Overall, it helps in making informed decisions based on data analysis.