Hello,
I have a dynamic range that I need to be able to calculate the standard deviation for. The dynamic range sometimes has blank cells and #N/A cells which I do not want included in the calculation. However, there are sometimes cells with the number 0 in it (instead of blank) which I do want to include. I have come up with an array formula, but the standard deviation it calculates is not correct. The formula is:
=STDEV(IF(ISNUMBER(A3:A20000)*ISNUMBER(A3:A20000),1,0))
*This is an array formula calculated by pressing CTRL+SHIFT+ ENTER
The number it calculates is 0.43, however, this is incorrect. If you just calculate the standard deviation of the actual data points in excel (cells A138:A5055 in this case) : STDEV(A138:A5055), it returns 0.17. This is the correct standard deviation. Could someone please help me with this?
Kind Regards,
Maani
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