document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1185618>Question 1185618</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Plywood contains minor imperfections that can be<BR>\n" );
document.write( "repaired with small \"plugs.\" One customer will accept<BR>\n" );
document.write( "plywood with a maximum of 3.5 plugs per sheet on<BR>\n" );
document.write( "average. Suppose a shipment was sent to this customer,<BR>\n" );
document.write( "and when the customer inspected two sheets at random,<BR>\n" );
document.write( "10 plugged defects were counted. What is the<BR>\n" );
document.write( "probability of observing 10 or more plugged defects if<BR>\n" );
document.write( "in fact the 3.5 average per sheet is being satisfied?<BR>\n" );
document.write( "Comment on what this probability implies about<BR>\n" );
document.write( "whether you think the company is meeting the 3.5 per<BR>\n" );
document.write( "sheet defect rate. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #816460 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=816460\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> one would expect to see 7 plugs in two sheets.<BR>\n" );
document.write( "Poisson parameter 7, see 10 or more<BR>\n" );
document.write( "1-poisson cdf (7, 9)=0.1695<BR>\n" );
document.write( "rough check is<BR>\n" );
document.write( "p(10)=0.7100<BR>\n" );
document.write( "p(11)=0.0452<BR>\n" );
document.write( "p(12)=0.0263<BR>\n" );
document.write( "p(13)=0.0142<BR>\n" );
document.write( "p(14)=0.0071<BR>\n" );
document.write( "p(15)=0.0033<BR>\n" );
document.write( "that sum is 0.1660\r<BR>\n" );
document.write( "\n" );
document.write( "If one uses a 5% level, the company is meeting standards.   </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );