On 15 Feb 2002 14:38:49 -0800, [EMAIL PROTECTED] (AP) wrote: > Hi all: > > I would appreciate your help in solving this question. > > calculate the standard deviation of a sample where the mean and > standard deviation from the process are provided? > E.g. Process mean = 150; standard deviation = 20. What is the SD for > a sample of 25? The answer suggested is 4.0
Here is a vocabulary distinction. Or error. I don't know if you are repeating the problem wrong, or you are speaking from a tradition that I am not familiar with. As I am familiar with it, statisticians say that "the standard deviation" is the "standard deviation of the sample." We say that the "standard deviation of the sample *mean*" will be frequently referred to as the "standard error"; and "The SD of the mean [or the SE] equals SD/sqrt(N)". That is confusing enough. I hope this makes your sources clear. -- Rich Ulrich, [EMAIL PROTECTED] http://www.pitt.edu/~wpilib/index.html ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at http://jse.stat.ncsu.edu/ =================================================================
