document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=270412>Question 270412</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Using the following probability distribution for \"Numbers of Cars sold\" determine the expected value and standard deviation.\r<BR>\n" );
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document.write( "Number of cars sold      Probability<BR>\n" );
document.write( "5                            .15<BR>\n" );
document.write( "8                             .3<BR>\n" );
document.write( "11                             .33<BR>\n" );
document.write( "17                            .22     </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #198116 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=198116\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using the following probability distribution for \"Numbers of Cars sold\" determine the expected value and standard deviation. <BR>\n" );
document.write( "Number of cars sold Probability<BR>\n" );
document.write( "5 .15<BR>\n" );
document.write( "8 .3<BR>\n" );
document.write( "11 .33<BR>\n" );
document.write( "17 .22 <BR>\n" );
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document.write( "Multiply each car sale number by its probability.<BR>\n" );
document.write( "Then add the products to find the expected value.<BR>\n" );
document.write( "E(x) = 10.2<BR>\n" );
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document.write( "Note: E(x) = u<BR>\n" );
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document.write( "To find the standard deviation:<BR>\n" );
document.write( "1st: Form (x-u)^2 for each \"car sales<BR>\n" );
document.write( "2nd: Add those numbers: 78.6<BR>\n" );
document.write( "3rd: Divide by N = sum of all the car sales:78.6/41 = 1.92<BR>\n" );
document.write( "4th: The standard deviation is the square root of the result of the 3rd step.<BR>\n" );
document.write( "s = 1.386<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
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