document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=137257>Question 137257</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780072966961/algebrahomeworkh>Applied Statistics in Business and Economics</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A sample of 20 pages was taken without replacement from the 1,591-page phone directory<BR>\n" );
document.write( "Ameritech Pages Plus Yellow Pages. On each page, the mean area devoted to display ads was measured<BR>\n" );
document.write( "(a display ad is a large block of multicolored illustrations, maps, and text). The data (in<BR>\n" );
document.write( "square millimeters) are shown below:<BR>\n" );
document.write( "0 260 356 403 536 0 268 369 428 536<BR>\n" );
document.write( "268 396 469 536 162 338 403 536 536 130<BR>\n" );
document.write( "(a) Construct a 95 percent confidence interval for the true mean. (b) Why might normality be an<BR>\n" );
document.write( "issue here? (c) What sample size would be needed to obtain an error of ±10 square millimeters<BR>\n" );
document.write( "with 99 percent confidence? (d) If this is not a reasonable requirement, suggest one that is. <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #100422 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=100422\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This was answered as problem #100023<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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