if I know MEAN and SEM values of two groups, how can I get the MEAN and SEM of increased/decreased percentage compared between the two groups?
I know there is a formula, but I cannot find it now.
Dear Colleague,
If you have only Mean and SEM of two groups, You can check the % difference difference between the groups by taking Mean values. Further, in your case you have SEM of two groups, here SEM is variability across the mean within the individual groups, you can not calculate the variability between the groups using individual group SEM/SD.
Hope you have understood my point.
Regards
Vishwanatha GL
The simple measure of coefficient of variation (CV) is a measure of variation that can be used to compare two groups. It has no units. CV = SD/mean
Dear Colleague,
As Dr.Mortlock mentioned. You can calculate CV for individual groups and compare the CVs of muLtiple groups by ANOVA. Here, The variation/variance spread across the groups you can compare and conclude whether it is statistically significant or not.
Regards
Vishwanatha GL
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