document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=574373>Question 574373</A>: <I><SPAN STYLE=\"word-break: break-all;\"> refer to the following information.<BR>\n" );
document.write( "About 60% of adults get less than the recommended 8 hours of sleep per night according to a study conducted by the University of Washington.\r<BR>\n" );
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document.write( "In a random sample of 7 adults, <BR>\n" );
document.write( "a) what is the expected number of them that get less than the recommended 8 hours of sleep per night?  (That is, find the mean.)<BR>\n" );
document.write( "b) what is the standard deviation of this distribution?<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 #369051 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=369051\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> About 60% of adults get less than the recommended 8 hours of sleep per night according to a study conducted by the University of Washington. <BR>\n" );
document.write( "In a random sample of 7 adults, <BR>\n" );
document.write( "a) what is the expected number of them that get less than the recommended 8 hours of sleep per night? (That is, find the mean.)<BR>\n" );
document.write( "mean = np = 7*0.6 = 4.2<BR>\n" );
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document.write( "b) what is the standard deviation of this distribution?<BR>\n" );
document.write( "std = sqrt(npq) = sqrt(4.2*0.4) = 1.2961<BR>\n" );
document.write( "====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=============<BR>\n" );
document.write( " </SPAN>\n" );
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