document.write( "Question 611086: If we wish to have a 98% confidence interval, what would be the value of a/2? show how you arrived at this answer \n" ); document.write( "

Algebra.Com's Answer #384835 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi, 
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document.write( "If we wish to have a 98% confidence interval, what would be the value of a/2? 
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document.write( "a/2 = .01  and using Excel function NORMSINV(0.01)= -2.326 or NORMSINV(.99) = 2.326
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document.write( "	a	a/2	crtical regions	
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document.write( "80%	0.2	10%	z <-1.28155	z >+1.28155
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document.write( "90%	0.1	5%	z <-1.645	          z >+1.645
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document.write( "92%	0.8	4%	z <-1.751	          z >+1.751
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document.write( "95%	0.05	2.50%	z <-1.96	          z >+1.96
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document.write( "98%	0.02	1%	z <-2.326	          z >+2.326
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document.write( "99%	0.01	0.50%	z<-2.576	          z >+2.576
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