document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=939175>Question 939175</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At one school, the mean amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching television per week has decreased.<BR>\n" );
document.write( "Formulate the null and alternative hypotheses for the study described.\r<BR>\n" );
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document.write( "  A.<BR>\n" );
document.write( "Ho: µ = 18.4 hours     H a : µ ¹ 18.4 hours\r<BR>\n" );
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document.write( "  B.<BR>\n" );
document.write( "Ho: µ = 18.4 hours     H a : µ < 18.4 hours\r<BR>\n" );
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document.write( "  C.<BR>\n" );
document.write( "Ho: µ ³ 18.4 hours     H a : µ < 18.4 hours\r<BR>\n" );
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document.write( "  D.<BR>\n" );
document.write( "Ho: µ = 18.4 hours     H a : µ > 18.4 hours </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #572224 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=572224\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> B.<BR>\n" );
document.write( " Ho: µ = 18.4 hours <BR>\n" );
document.write( " Ha: µ < 18.4 hours  </SPAN>\n" );
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