Assume X~ . If we take a random sample of size n, how do we calculate that the probability of the average of the sample is at least . ie
Last edited by Pur; Feb 7th 2009 at 08:22 AM.
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Originally Posted by Pur Assume X~ . If we take a random sample of size n, how do we calculate that the probability of the average of the sample is at least . ie Use the sampling distribution of the mean (see Sampling distribution - Wikipedia, the free encyclopedia)
As directed by Pur, sampling distibution of normals is another normal with mean=mu and std=sigma/sqrt(n). -O
Last edited by mr fantastic; Feb 7th 2009 at 07:04 PM. Reason: Removed link not relevant to question (looks like a signature but isn't)
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