Standard deviation is a measure of how spread out a set of data is. It is calculated by finding the square root of the variance, which is the average of the squared differences between each data point and the mean.
The standard deviation is important because it can be used to compare the variability of different data sets. For example, a data set with a high standard deviation is more spread out than a data set with a low standard deviation. It can help to identify outliers in our data. An outlier is a value that is significantly different from the other values in a dataset.
