document.write( "Question 438330: A poll was taken of 500 College graduates. The college graduates sampled were asked whether Americans feel satisfied with their lives; 350 responded “very satisfied” Use this date to obtain a 97% confidence interval for the corresponding population proporation, p. \n" ); document.write( "
Algebra.Com's Answer #303175 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi
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document.write( "A poll was taken of 500 College graduates. 
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document.write( "The college graduates sampled were asked whether Americans feel satisfied with their lives; 
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document.write( "350 responded “very satisfied” Use this date to obtain a 97% confidence
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document.write( " interval for the corresponding population proporation, p. 
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document.write( "p-hat = 350/500 = .7
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document.write( "97% confidence then z = 2.1701
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document.write( "ME =  2.1701*sqrt[0.7*0.3/500] = 0.04447
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document.write( "97%CI: 0.7-0.04447 < p < 0.7+0.04447
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document.write( "97%CI: 0.6555< p < 0.7448\r
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document.write( "Summary of other critical regions
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document.write( "	a	a/2	crtical regions	
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document.write( "90%	0.1	5%	z <-1.645	z >+1.645
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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 <-2.33	z >+2.33
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document.write( "99%	0.01	0.50%	z<-2.575	z >+2.575
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