document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1159480>Question 1159480</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A national magazine claims that the average college student watches less television that general public. The national average is 30 hours per week, with a standard deviation of 1.5 hours. A sample of 30 college student has a mean of 26 hours. a=.05  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #782526 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=782526\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Assuming random sample, normality <BR>\n" );
document.write( "probability of this occurring (could also be a hypothesis test, but what is wanted is not stated).<BR>\n" );
document.write( "z=(x-mean)/sigma/sqrt(n)<BR>\n" );
document.write( "=(26-30)/1.5/sqrt (30)<BR>\n" );
document.write( "=-4*sqrt(30)/1.5\r<BR>\n" );
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document.write( "=-14.61<BR>\n" );
document.write( "This has a p-value of <<0.0001, in this case essentially 0.\r<BR>\n" );
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document.write( "If the hypothesis is that the two are the same, it is rejected. ]<BR>\n" );
document.write( "If the hypothesis is that college students watch more or the same, and the alternative is that they don't, that hypothesis would also be rejected.  </SPAN>\n" );
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