Hi Bob,
I guess for Standard Deviation you could use the function STDEV()
I usually calculate the weighted average using the following formula:
=SUMPRODUCT(G1:G15,H1:H15)/SUM(H1:H15)
in your case could also be:
=SUMPRODUCT(G1:G15,H1:H15)/H16
Regards,
KL
"bob green" wrote in message
. ..
I have data from a series of studies in 2 columns of data (G1-G15) &
(H1-H15).
Column 1 = the number positive for an event in each study
Column 2 = the sample size for each study
I calculated a sum for column 1 & column 2 in G16 & H16 respectively.
In addition I want to calculate the average and standard deviation.
The following formula computes an average but I also need the
standard deviation.
=G16*100/H16
Any assistance is appreciated.
Bob
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