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Asymptotic Methods in Statistical Inference - Statistics Centre

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43<br />

5. Introduction to asymptotic tests<br />

• General test<strong>in</strong>g framework: We observe X =<br />

( 1 ) where the distribution of X depends<br />

on a (univariate) parameter . Wetest : = 0<br />

vs. : 0 by reject<strong>in</strong>g if a ‘test statistic’<br />

= (X) is too large, say ,the‘critical<br />

value’ def<strong>in</strong><strong>in</strong>g the ‘rejection region’. For a<br />

specified ‘level’<br />

= (Type I error) = (reject | true)<br />

we wish to atta<strong>in</strong> asymptotically:<br />

0 ( )= + (1)

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