document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=232876>Question 232876</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose household incomes in Indiana Co have a mean of $48,000 and a standard deviation of $18,000. What is the probability that a random sample of 100 households with a mean income below $45,000?<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 #171973 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=171973\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose household incomes in Indiana Co have a mean of $48,000 and a standard deviation of $18,000. What is the probability that a random sample of 100 households with a mean income below $45,000?<BR>\n" );
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document.write( "z(45000) = (45000-48000)/[18000/(sqrt(100)]<BR>\n" );
document.write( "= -3000/(1800)<BR>\n" );
document.write( "= -1.66667<BR>\n" );
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document.write( "P(x < 45000) = P(z < -1.66667) = 0.04779,,,\r<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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