document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=318448>Question 318448</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Replacement times for TV sets are normally distributed with a mean of 8.2 years and a standard deviation of 1.1 years.  \r<BR>\n" );
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document.write( "A) find the probability that a randomly selected TV will have a replacement time less than 6.0 years.\r<BR>\n" );
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document.write( "B) If you want to provide a warranty so that only 1% of the TV sets will be replaced before the warranty expires, what is the time length of that warranty? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #228066 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=228066\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a) Find the z score.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=%28x-mu%29%2Fsigma=%286-8.2%29%2F1.1 ALIGN=MIDDLE  ALT=\"z=%28x-mu%29%2Fsigma=%286-8.2%29%2F1.1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=-2 ALIGN=MIDDLE  ALT=\"z=-2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%28x+%3C=+-2%29=0.02275 ALIGN=MIDDLE  ALT=\"P%28x+%3C=+-2%29=0.02275\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "b) Find z so that P(z)=0.01.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=-2.3264 ALIGN=MIDDLE  ALT=\"z=-2.3264\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-8.2%29%2F1.1=-2.3264 ALIGN=MIDDLE  ALT=\"%28x-8.2%29%2F1.1=-2.3264\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-8.2=-2.559 ALIGN=MIDDLE  ALT=\"x-8.2=-2.559\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=5.64 ALIGN=MIDDLE  ALT=\"x=5.64\"   DISABLED_style= \"max-width:90%; height:auto;\" > yrs </SPAN>\n" );
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