Pooling Standard Deviation

01112017, 02:42 PM
Post: #3




RE: Pooling Standard Deviation
Thanks, but what I want is a way to unlink the degrees of freedom of the std deviation estimate from the number of points used to calculate the mean.
For example, lets say I am manufacturing batches of widgets: I have made several batches, so I know my standard deviation with pretty good accuracy. I make a new batch of 5 widgets. I would like to be able to specify that my standard deviation is associated with a number of degrees of freedom much larger than 5 to greatly improve my estimate, but I can't with the current inference App. It would be nice if the degrees of freedom for the std dev would be specified separately, but default to 1the number used to calculate the mean. 

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Messages In This Thread 
Pooling Standard Deviation  KeithB  01102017, 03:43 AM
RE: Pooling Standard Deviation  mark4flies  01112017, 12:45 PM
RE: Pooling Standard Deviation  KeithB  01112017 02:42 PM

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