document.write( "Question 863423: Find the following probabilities for the following standard normal random variable Z.\r
\n" ); document.write( "\n" ); document.write( "P (-2.22 < Z < 1.31)\r
\n" ); document.write( "\n" ); document.write( "Another problem is: Suppose X is normally distributed random variable with mean=10 and SD=2 Find each of the following probabilities.
\n" ); document.write( "A) P(10.56 less or equal X less or equal 14.7)
\n" ); document.write( "B) P(5.28 less or equal X less or equal 12.7)
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Algebra.Com's Answer #520416 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Find the following probabilities for the following standard normal random variable Z.
\n" ); document.write( "P (-2.22 < Z < 1.31) = normalcdf(-2.22,1.32) = 0.8917
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\n" ); document.write( "Another problem is: Suppose X is normally distributed random variable with mean=10 and SD=2 Find each of the following probabilities.
\n" ); document.write( "A) P(10.56 less or equal X less or equal 14.7)
\n" ); document.write( "z(10.56) = (10.56-10)/2 = 0.28
\n" ); document.write( "z(14.7) = (14.7-10)/2 = 2.35
\n" ); document.write( "Then P(10.56<= x <=14.7) = P(0.28<= z <=2.35) = 0.3804
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\n" ); document.write( "B) P(5.28 less or equal X less or equal 12.7)
\n" ); document.write( "I'll leave that to you.
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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