document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1064873>Question 1064873</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In one region, the September energy consumption levels for single -family homes are found to be normally distributed with a mean of 1060 kWh and a standard deviation of 233 kWh. If 44 different homes are randomly selected, find the probability that their mean energy consumption level for September is greater than 1045 kWh. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #679973 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=679973\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In one region, the September energy consumption levels for single -family homes are found to be normally distributed with a mean of 1060 kWh and a standard deviation of 233 kWh. If 44 different homes are randomly selected, find the probability that their mean energy consumption level for September is greater than 1045 kWh.<BR>\n" );
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document.write( "z(1045) = (1045-1060)/(233/sqrt(44)) = -15*sqrt(44)/233 = -0.4270<BR>\n" );
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document.write( "P(x > 1045) = P(z > -0.4270) = 0.6653<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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