document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=353660>Question 353660</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The lifetime of a color television is normally distributed with a mean of 7.8 years and a standard deviation of 3 years. What is the probability that a TV will last more than 10 years?   more than 7.8 years?   How long should the warranty period be (in years) if they want to replace only 1% of the TVs?   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #252776 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=252776\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 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 ALIGN=MIDDLE  ALT=\"z=%28x-mu%29%2Fsigma\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=%2810-7.8%29%2F3=0.7333 ALIGN=MIDDLE  ALT=\"z=%2810-7.8%29%2F3=0.7333\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%28z%29=0.841345 ALIGN=MIDDLE  ALT=\"P%28z%29=0.841345\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So then <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%28x%3E10%29=1-0.841345=0.158655 ALIGN=MIDDLE  ALT=\"P%28x%3E10%29=1-0.841345=0.158655\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=%287.8-7.8%29%2F3=0 ALIGN=MIDDLE  ALT=\"z=%287.8-7.8%29%2F3=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%28z%3E7.8%29=0.5 ALIGN=MIDDLE  ALT=\"P%28z%3E7.8%29=0.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%28z1%29=0.01 ALIGN=MIDDLE  ALT=\"P%28z1%29=0.01\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z1=-2.57583 ALIGN=MIDDLE  ALT=\"z1=-2.57583\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x1=-2.57583%283%29%2B7.8 ALIGN=MIDDLE  ALT=\"x1=-2.57583%283%29%2B7.8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x1=0.072512 ALIGN=MIDDLE  ALT=\"x1=0.072512\"   DISABLED_style= \"max-width:90%; height:auto;\" > years\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );