Standard deviation (STDEV) 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. STDEV is a useful statistic for understanding the variability of a data set and for comparing different data sets.
In a TI-84 calculator, you can find the STDEV of a data set by using the following steps:
