Enter your data in a single column or row
Calculate the sample standard deviation with `=STDEV.S(range)`
Calculate the sample size with `=COUNT(range)`
Calculate the standard error with `=STDEV.S(range)/SQRT(COUNT(range))`
If using a population standard deviation, use `=STDEV.P(range)/SQRT(COUNT(range))`
Replace `range` with your actual cell range, such as `A1:A10`