document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1180475>Question 1180475</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A national magazine claims that the average college student watches less television than the general public. The national average is 30 hours per week, with a standard deviation of 1.5 hours.  A sample of 40 college students has a mean of 26 hours. Alpha=0.05. Find H0 and H1. Is there enough evidence to reject the claim? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #810690 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=810690\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ho: mean is > =30 hr.<BR>\n" );
document.write( "H1: mean is < 30 hr.<BR>\n" );
document.write( "alpha=0.05 p{reject Ho|Ho true}<BR>\n" );
document.write( "test stat is a z, critical value is z<-1.645.<BR>\n" );
document.write( "calculation z=(26-30)/1.5/sqrt(40)=-4/0.2372=-16.9<BR>\n" );
document.write( "strongly reject Ho with p-value <<0.0001 (really 0), but I usually stop at 0.0001. </SPAN>\n" );
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