document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1159862>Question 1159862</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The life of a Radio Shack record player is normally distributed with a mean of 3.8 years and a standard deviation of 1.1 years. Radio Shack guarantees its record players for 2 years.\r<BR>\n" );
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document.write( "(a) Find the probability that a record player will last less than 2 years? <BR>\n" );
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document.write( "(b) Find the probability that a record player will last more than 4 years? <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 #782956 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=782956\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=(x-mean)/sd<BR>\n" );
document.write( "=(2-3.8)/1.1=-1.8/1.1, want z < -1.64 and that has probability 0.0509 not rounded, (0.0505 if -1.64 is used)\r<BR>\n" );
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document.write( "> 4 years is z >(0.2/1.1) and not rounded that is probability 0.4279 </SPAN>\n" );
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