document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=672987>Question 672987</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The braking distance of a sample of Ford F-150's are normally distributed. On a dry surface, the mean braking distance was 158 feet with a standard deviation of 7.23 ft. What is the longest braking distance on a dry surface one of these F-150 trucks could have an still be in the best 1%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #418428 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=418428\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The braking distance of a sample of Ford F-150's are normally distributed. On a dry surface, the mean braking distance was 158 feet with a standard deviation of 7.23 ft. What is the longest braking distance on a dry surface one of these F-150 trucks could have and still be in the best 1%?<BR>\n" );
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document.write( "I'm guessing the best 1% means shorter braking distances.<BR>\n" );
document.write( "I may be wrong about what is \"best\".<BR>\n" );
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document.write( "The z-value with a left-tail of 1% is -2.4363<BR>\n" );
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document.write( "The corresponding distance value is x = z*s+u<BR>\n" );
document.write( "x = -2.4363*7.23+158<BR>\n" );
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document.write( "x = 141.18 feet<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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