document.write( "Question 405522: Speed limit is 65 mph. The mean speed of automobiles was measured at 63 mph with a standard deviation of 8 mph. If the speeds are normally distributed, what percentage of the automobiles are exceeding the speed lilmit? If the Highway Patrol decides to ticket ony motorist exceeding 72 mph, what percentage of the motorist might they arrest? \n" ); document.write( "

Algebra.Com's Answer #286407 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi, 
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document.write( "*Note: 
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document.write( "  z = 65-63/8 = 2/8 = .25
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document.write( " P(z > .25) = 1-.5987 = .4013
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document.write( "   40.13% are exceeding the speed limit\r
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document.write( " z = 72-63/8 = 9/8 = 1.125
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document.write( "P(z> 1.125) = 1 - .8697 = .1303  
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document.write( "13.03% might expect to be exceeding a speed limit of 72mph & be ticketed.
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