Here, s = series number I = point number in series s m = number of series for point y in the chart n = number of points in each series y is = data value of series s and i the point n y = total number of data values in all series M = arithmetic mean Relative standard deviation is calculated by dividing the standard deviation of a group of values by the average of the values.
Here, s = series number I = point number in series s m = number of series for point y in the chart n = number of points in each series y is = data value of series s and i the point n y = total number of data values in all series M = arithmetic mean STDEVP(number1,…) is the old Excel function to find standard deviation of a population. The RSD usually written with the mean and a plus/minus symbol: 4.4 ± 2.3%. Of course, you probably need to replace H with the appropriate column for your data and replace 1 and 14 with the range of rows you want to cover. So you need to be careful when you calculate these sums that you are using the correct values.
Place the cursor where you wish to have the standard deviation appear and click the mouse button.Select Insert Function (f x) from the FORMULAS tab. Descriptive Statistics in Microsoft Excel 2016. The standard deviation requires us to first find the mean, then subtract this mean from each data point, square the differences, add these, divide by one less than the number of data points, then (finally) take the square root.