document.write( "Question 286637: What are the three different types or sizes of critical regions? \n" ); document.write( "
Algebra.Com's Answer #207918 by stanbon(75887)\"\" \"About 
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The types are left tail, right tail, two-tail.
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\n" ); document.write( "Cheers,
\n" ); document.write( "stan H.
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