document.write( "Question 1197534: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 78.5 for a sample of size 26 and standard deviation 13.6. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 80% confidence level). Assume the data is from a normally distributed population.
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Algebra.Com's Answer #830925 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( "'Standard Distribution': µ = 78.5 and σ = 13.6\r\n" );
document.write( "n = 26\r\n" );
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document.write( " 80% confidence interval:  z = 1.282  |  Invnorm(.80 + .2/2) = Invnorm(.90) \r\n" );
document.write( "   = 3.419\r\n" );
document.write( "78.5 - 3.419  < 78.5 + 3.419\r\n" );
document.write( "75.351<  < 81.649\r\n" );
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document.write( "90% confident,  interval will contain true population mean\r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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