document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=824072>Question 824072</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 175 and a variance of 16. The material is considered defective if the breaking strength is less than 165.8 pounds. What is the probability that a single, randomly selected piece of material will be defective? </SPAN>\n" );
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document.write( "z(165.8) = (165.8-175)/16 = -0.5750<BR>\n" );
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document.write( "P(x < 165.8) = P(z < -0.575 = normalcdf(-100,-0.575) = 0.2826<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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