document.write( "Question 477770: A study found that the mean systolic blood pressure was 106 mm Hg. Assume that
\n" ); document.write( "systolic blood pressure follows a normal distribution with a standard deviation
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\n" ); document.write( "\n" ); document.write( " A.) What is the probability that a randomly selected systolic blood pressure
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\n" ); document.write( "\n" ); document.write( " B.) Find the 97.5th percentile of systolic blood pressures. Interpret the
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Algebra.Com's Answer #327409 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "μ = 106  
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document.write( "σ = 8
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document.write( "A) z = -8/8 = 1  and z = 16/8 = 2  
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document.write( "P(-1 > z < 2) =  .9883    - .1587 = .8186 or 81.86%
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document.write( "              NORMSDIST(2)  NORMSDIST(-1)\r
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document.write( "B) 97.5 percentile  P = .975 the z = 1.96
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document.write( "  1.96 *8 + 106 =  = 121.68 or rounded up 122mm Hg
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document.write( " 97.5 % of the people have a systolic blood pressure less than 122 \n" );
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