document.write( "Question 454517: Speed trap on the highway set by the O.P.P. shows that the mean speed of cars is 103.4 km/h with a standard deviation of 9.8 km/h. The posted speed limit on the highway is 100 km/h.\r
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document.write( "Police officers tend not to pull over drivers between 100 km/h and 110 km/h. What percentage of drivers is this? \n" );
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Algebra.Com's Answer #312108 by edjones(8007)![]() ![]() You can put this solution on YOUR website! z(below M)=(100-103.4)/9.8= -0.3469 \n" ); document.write( "z(above M)=(110-103.4)/9.8= 0.6735 \n" ); document.write( ". \n" ); document.write( "Area under curve -0.3469 to 0 = 0.1357 \n" ); document.write( "Area under curve 0 to 0.6735 = 0.2497 \n" ); document.write( "0.1357+0.2497=.3854=38.54% \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |