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Centro Argent<strong>in</strong>o de Estudios Internacionales / Entelequia. Revista Interdiscipl<strong>in</strong>ar<br />

methodological risk, very well known <strong>in</strong> survey research. The marg<strong>in</strong> of error at<br />

90 % confidence is approximately determ<strong>in</strong>ed by <strong>the</strong> formula 9 :<br />

(4) marg<strong>in</strong> of error at 90 % confidence = 0.82 / (n^0.5)<br />

We thus arrive at <strong>the</strong> follow<strong>in</strong>g marg<strong>in</strong>s of errors for our sub samples (Graph 2a<br />

to Graph 2c).<br />

Graph 2a: marg<strong>in</strong> of error at 90 % confidence<br />

sampl<strong>in</strong>g error +-<br />

90,0000<br />

80,0000<br />

70,0000<br />

60,0000<br />

50,0000<br />

40,0000<br />

30,0000<br />

20,0000<br />

10,0000<br />

0,0000<br />

sampl<strong>in</strong>g error +- with 90 % confidence<br />

0 500 1000 1500 2000 2500 3000 3500<br />

sample size<br />

9 http://www.reference.com/browse/wiki/Marg<strong>in</strong>_of_error . Please note that n = sample<br />

size<br />

Arno Tausch, Christian Bischof, Tomz Kastrun, Karl Mueller 38

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