document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=314741>Question 314741</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have been working on my homework all day and this may be the simplest of problems but I am confusing myself and I was wondering if I could get a little help figuring it out. Can you show me how you get the answer.\r<BR>\n" );
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document.write( "Suppose on a highway with a speed limit of 65 mph, the speed of cars are independent and normally distributed with an average speed = 65 mph and standard deviation = 5 mph. What is the expected value of the sample mean speed in a random sample of n = 100 cars?<BR>\n" );
document.write( "A) 13 mph<BR>\n" );
document.write( "B) 0.65 mph<BR>\n" );
document.write( "C) 6.5 mph<BR>\n" );
document.write( "D) 65 mph\r<BR>\n" );
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document.write( "Thanks,<BR>\n" );
document.write( "Dave<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #225101 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=225101\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose on a highway with a speed limit of 65 mph, the speed of cars are independent and normally distributed with an average speed = 65 mph and standard deviation = 5 mph. <BR>\n" );
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document.write( "What is the expected value of the sample mean speed in a random sample of <BR>\n" );
document.write( "n = 100 cars?<BR>\n" );
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document.write( "The distribution of ALL samples of size <BR>\n" );
document.write( "100 has a mean of 65 and std=5/sqrt(100).<BR>\n" );
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document.write( "Expected value of the sample mean speed = 65 mph.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "A) 13 mph<BR>\n" );
document.write( "B) 0.65 mph<BR>\n" );
document.write( "C) 6.5 mph<BR>\n" );
document.write( "D) 65 mph <BR>\n" );
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