Any formula or script to combine standard deviation of different group into one standard deviation
Hi all,
Currently, I was stuck to combining standard deviation from different group into one standard deviation.
For example
A) sample = 50, mean = 5, standard deviation = 3B) sample = 40, mean = 6, standard deviation =2C) sample = 20, mean = 7, standard deviation =4How I can combine standard deviation from 3 groups into one. Is there any function available in JMP to support this?
Thank a lot