document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=108786>Question 108786</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with the following question:  (It is not in the book, it is on a homework assignment.)\r<BR>\n" );
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document.write( "The lifetime of a popular dvd player is guaranteed to be 8 years. If the lives of this dvd players are normally distributed with a mean of 8.75 and a SD of .45 years, find the percentage of the DVD players that will not meet the guarantee. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #79377 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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/cgi-bin/show-face.mpl?user=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=79377\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 8.75-8.00=.75<BR>\n" );
document.write( ".75/.45=1.67 standard deviations from the mean.<BR>\n" );
document.write( "We want to know the area under the normal distribution curve only at one end since we are not interested in extreme long life of the DVD players.<BR>\n" );
document.write( "The answer in the table is about .05 or 5% will not meet the guarantee.<BR>\n" );
document.write( "Ed\r<BR>\n" );
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