Anna is a project manager for a company specializing in providing military devices for jet fighters. Her departmental projects usually require that all deliverables be within an accuracy of Six Sigma. However, she has recently received her first contract stating that the accuracy of the deliverable can be within One Sigma. What is the level of accuracy of One Sigma?

In statistical terms, Sigma (σ) is a measure of variation or standard deviation from the mean. It is often used to describe the spread or dispersion of data points within a process or system. The concept of Sigma levels is commonly used in Six Sigma methodology, which aims to reduce defects and improve process efficiency. Each Sigma level corresponds to a certain percentage of data falling within a specified range around the mean. One Sigma (1σ): Approximately 68.27 percent of the data falls within one standard deviation of the mean. This represents a relatively wide range around the average and includes a larger portion of the data.