Open Excel and create a new spreadsheet. Enter the standard samples you are graphing into cells "A1" and "A2." For example, enter "Concentration" and "Absorbance." ...

How to Make a Curved Chart for Standard Deviation in Excel. ... With this data you can then create a curved chart, known as a bell curve. Data, Average and Standard Deviation.

Basically, this conversion forces the mean and stddev to be standardized to 0 and 1 respectively, which enables a standard defined set of Z-values (from the Normal Distribution Table) to be used ...