Standard deviations

Standard deviation is a statistical measure that shows how much individual values in a data set differ from the average (mean) value. In simpler terms, it helps us understand the spread or variability of the data. A low standard deviation indicates that the data points are close to the mean, while a high standard deviation means there's a wider range of values. This is useful for gauging consistency or reliability in various contexts, like test scores or measurements, allowing us to see how much variation exists around the average.