document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=208222>Question 208222</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The standard error of the mean for a characteristic of a sample of 100 identity theft victims is 30. In order to cut the standard error to 15, we would: \r<BR>\n" );
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document.write( "a. Increase the sample size to 200<BR>\n" );
document.write( "b. Increase the confidence interval  <BR>\n" );
document.write( "c. Increase the sample size to 400<BR>\n" );
document.write( "d. Decrease the sample size to 50<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 #157522 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=157522\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The standard error of the mean for a characteristic of a sample of 100 identity theft victims is 30. In order to cut the standard error to 15, we would: <BR>\n" );
document.write( "a. Increase the sample size to 200<BR>\n" );
document.write( "b. Increase the confidence interval <BR>\n" );
document.write( "c. Increase the sample size to 400<BR>\n" );
document.write( "d. Decrease the sample size to 50<BR>\n" );
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document.write( "SE = t<BR>\n" );
document.write( "If SE = 30 and n = 100 you have<BR>\n" );
document.write( "30 = t<BR>\n" );
document.write( "ts = 300<BR>\n" );
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document.write( "If you want SE to be 15<BR>\n" );
document.write( "you need:<BR>\n" );
document.write( "15 = ts/sqrt(n)<BR>\n" );
document.write( "15 = 300/sqrt(n)<BR>\n" );
document.write( "sqrt(n) = 20<BR>\n" );
document.write( "n = 400<BR>\n" );
document.write( "======================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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