Hi,
Is it possible to calculate the standard deviation of a mean difference, knowing only the mean and SD for instrument 1 and mean and SD for instrument 2 (paired data)? Eg. Mean1=785 (SD1=337), mean2=897 (SD2=444). The mean difference is -112, but I do not have the SD of the mean difference. This is for meta-analysis purposes, where individual papers have provided incomplete data. Thanks!
GM
Here's the formula: https://stattrek.com/sampling/difference-in-means.aspx
Thank you!
Now I understand that this assumes the two samples are independent of one another. Can one assume that this applies to paired data?
Yes, this is for independent samples. The formula for paired samples is different.
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