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I just had this problem myself. A simple solution, not 'the solution' (as i believe you can pay for this function to be added to excel), is as follows: (NB. This can be checked with reference to the GEOMEAN function).

e.g. your data is in column A (A3-A33)

in cell B3 type =LN(A3) (i.e. the natural log)

copy and paste down to B33.

In B34, calculate the standard deviation of the loged numbers i.e. =STDEV(B3:B33)

In A34 type =EXP(B34) This is your geometric standard deviation!!

You can check this method with ref. to the GEOMEAN function.

Take the mean of column B. i.e. in cell B35 type =average(B3:B33)

In cell A34 type =EXP(B34).

This should returen the same answer as =GEOMEAN(A3:A33)

There is an error in the above mentioned function which is:

//In B34, calculate the standard deviation of the loged numbers i.e. =STDEV(B3:B33)

Here do not calculate the STDEV(b3:b33) instead, calculate the =AVG(b3:b33)

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13y ago

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Wiki User

9y ago

The command to find the sample standard deviation, which is SX, in Excel is:

=STDEV(VALUES)

The command to find the population standard deviation in Excel is:

=STDEVP(VALUES)

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Wiki User

9y ago

You can use the STDEV function that is provided by Excel. If the cells for A2 to A30 had the values you wanted to get the Standard Deviation of, you would enter this into a cell:

=STDEV(A2:A30)

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Q: How do you perform Geometric standard deviation in Excel?
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