This article teaches you how to calculate the average standard error using Excel. Calculate the standard error by dividing the Standard Deviation (σ) by the square root (√) of the number of samples.
Step
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Step 1. Open Microsoft Excel
The app has a green icon that looks like a spreadsheet with an “X” on it.
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Step 2. Open or create a new Excel document
If you already have a document containing data, reopen it by clicking “Open” or Open. You can also create a new document by clicking “New” or New and entering the data you want to use.
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Step 3. Find the Standard Deviation
Although calculating the Standard Deviation usually requires several mathematical steps, you can do this by typing the following formula =stdev(''cell range'').
For example, if your data is in boxes A1 to A20, type =stdev(A1:A20) into an empty box to get the Standard Deviation number
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Step 4. Type the Standard Average Error formula into an empty box
The formula for calculating Standard Average Error in Excel is =stdev(''cell range'')/SQRT(count("cell range")).