document.write( "Question 1174776: PLEASE HELP ME SOLVE THIS, THANK YOU!\r
\n" ); document.write( "\n" ); document.write( "A certain brand of alcohol claims that the alcohol concentration of
\n" ); document.write( "the product is 70%. To test this claim, a random sample of 15
\n" ); document.write( "bottles of this brand were tested and an average of 68% alcohol
\n" ); document.write( "concentration was obtained with a standard deviation of 8%. Is the
\n" ); document.write( "claim valid at the 0.05 level of significance? \n" ); document.write( "

Algebra.Com's Answer #800251 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "Hi\r\n" );
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document.write( "Sample:  n = 15 , mean = .68,  sd = .08\r\n" );
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document.write( "Ho: u =  .70 (claim)\r\n" );
document.write( "Ha: u < .70\r\n" );
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document.write( " t(.68) = (.68 -.70)/[.08/sqrt(15)] = -.0645\r\n" );
document.write( " p-value = P( t< -.0645 when df = 14) = .47\r\n" );
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document.write( "Since the p-value is greater than 5%, fail to reject Ho.\r\n" );
document.write( "Conclusion: The claim is reasonable at the 5% confidence level.\r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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