document.write( "Question 578786: Assume that blood pressure readings are normally distributed with a mean of 117 and a standard deviation of 5. A researcher wishes to select people for a study but wants to exclude the top 10 percent. What would be the cutoff blood pressure to qualify for the study?
\n" ); document.write( "a)120.5
\n" ); document.write( "b)117.0
\n" ); document.write( "c)124.6
\n" ); document.write( "d)123.4
\n" ); document.write( "e)121.8 \n" ); document.write( "
Algebra.Com's Answer #370784 by stanbon(75887)\"\" \"About 
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Assume that blood pressure readings are normally distributed with a mean of 117 and a standard deviation of 5. A researcher wishes to select people for a study but wants to exclude the top 10 percent. What would be the cutoff blood pressure to qualify for the study?
\n" ); document.write( "Find the z-value with a left-tail of 0.90
\n" ); document.write( "invNorm(0.90) = 1.6449
\n" ); document.write( "---
\n" ); document.write( "Find the corresponding bp value:
\n" ); document.write( "bp = z*s + u
\n" ); document.write( "---
\n" ); document.write( "blood pressure = 1.6449*5+117 = 125.22
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "a)120.5
\n" ); document.write( "b)117.0
\n" ); document.write( "c)124.6
\n" ); document.write( "d)123.4
\n" ); document.write( "e)121.8
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