See STDEV
In Google Sheets, the function STDEV.S is used to calculate the standard deviation of a set of values. It calculates the standard deviation based on a sample of data, rather than the entire population. The "S" in STDEV.S stands for "sample."
The syntax for the STDEV.S function is as follows: STDEV.S(value1, [value2, …])
value1, value2, …: These are the individual values or ranges of cells that you want to include in the calculation of the standard deviation. You can specify multiple values or ranges by separating them with commas.
The STDEV.S function measures the variability or dispersion of the values in the sample. It tells you how spread out the values are from the average (mean) value.
A higher standard deviation indicates greater variability, while a lower standard deviation suggests less variability.
It's important to note that if you want to calculate the standard deviation of an entire population, you should use the STDEV.P function instead.