If you are looking forward towards calculating the Standard Deviation and Standard Error of the Mean in Excel, please check this article.

Enter root-mean-square (RMS) voltage. To calculate the RMS voltage, you take a number of voltage readings, square them, add them all together, and then divide by the number of entries in the ...

Enter root-mean-square (RMS) voltage. To calculate the RMS voltage, you take a number of voltage readings, square them, add them all together, and then divide by the number of entries in the ...