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Sample size

 
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Bitekson



Joined: 24 Jun 2010
Posts: 2

PostPosted: Thu Jun 24, 2010 4:40 am    Post subject: Sample size Reply with quote

How do i arrive at a statistically representative sample size? What is the minimum sample size for just about any situation?, And how do you arrive there without having to shed much sweat?
Cant really see an acceptable short cut to jargonies of complex statistical formulae, yet would want to.
Its a survey i want to do in a logistically very taxing region. And what's more, no reliable institutions from which to seek help.
Inputs will be highly appreciated.
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alethephant



Joined: 06 Sep 2006
Posts: 200
Location: Virginia Beach

PostPosted: Thu Jun 24, 2010 11:48 am    Post subject: Sample size Reply with quote

Use N = 8/E^2, where E = the effect you want to be able to detect, in units of the standard deviation of the population being sampled.

This formula is not complicated, so it should meet your need.
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Bitekson



Joined: 24 Jun 2010
Posts: 2

PostPosted: Fri Jun 25, 2010 12:53 am    Post subject: Reply with quote

Hi,
Thank you for taking your time trying to help. But i cant make much sense from what you have just given me. Especially the 'effect' you said.
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