Select an empty cell where you want the result
Use `=STDEV.S(range)` for a sample standard deviation
Use `=STDEV.P(range)` for a population standard deviation
Replace `range` with the cell range, such as `A1:A10`
Press `Enter`
To include only specific cells, select them directly in the formula
For older Excel versions, use `=STDEV(range)` for sample standard deviation
Use `=STDEV.S(A1:A10)` for a sample
Use `=STDEV.P(A1:A10)` for a population