document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=370305>Question 370305</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a random survey of 226 college students, 20 reported being \"only\" children (with no siblings). Estimate with 95% confidence the proportion of students nationwide who are only children (please use the adjusted formula).\r<BR>\n" );
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document.write( " A. (0.022,0.189) <BR>\n" );
document.write( " B. (0.058,0.134) <BR>\n" );
document.write( " C. (0.096,0.203) <BR>\n" );
document.write( " D. (0.194,0.265) <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 #263991 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=263991\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Which of the following statements about confidence intervals is INCORRECT?<BR>\n" );
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document.write( "A. If we keep the sample size fixed, the confidence interval gets wider as we increase the confidence coefficient.<BR>\n" );
document.write( "True<BR>\n" );
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document.write( "B. If the population standard deviation increases, the confidence interval decreases in width.<BR>\n" );
document.write( "False<BR>\n" );
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document.write( "C. If the confidence intervals for two means do not overlap very much, there is evidence that the two population means are different.<BR>\n" );
document.write( "True<BR>\n" );
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document.write( "D. If we keep the confidence coefficient fixed, the confidence interval gets narrower as we increase the sample size.<BR>\n" );
document.write( "True<BR>\n" );
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document.write( "E. A confidence interval for a mean always contains the sample mean. <BR>\n" );
document.write( "True<BR>\n" );
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document.write( "Probability-and-statistics/370305 (2010-11-12 22:07:11): In a random survey of 226 college students, 20 reported being \"only\" children (with no siblings). Estimate with 95% confidence the proportion of students nationwide who are only children (please use the adjusted formula). <BR>\n" );
document.write( "A. (0.022,0.189) <BR>\n" );
document.write( "B. (0.058,0.134) <BR>\n" );
document.write( "C. (0.096,0.203) <BR>\n" );
document.write( "D. (0.194,0.265) <BR>\n" );
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document.write( "None of those answers is correct.<BR>\n" );
document.write( "It should be (0.05147,0.12552)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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