Calculating standard deviation manually can be time-consuming and complex. Excel's STDEV formula can automatically calculate the standard deviation of any set of numbers, so you don't have to go ...

Learn how to calculate Standard Deviationin Excel. The STDEV function can be used to estimate standard deviation based on sample in Excel.

Calculate your T-Value by taking the difference between the mean and population mean and dividing it over the standard deviation divided by the degrees of freedom square root.