document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=874760>Question 874760</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose a firm that produces light bulbs wants to know whether it can say that its light bulbs typically last more than 1500 hours. Hoping to find support for their claim, the firm collects a random sample of n = 25 light bulbs and records the lifetime (in hours) of each bulb. The information related to the hypothesis test is presented below. \r<BR>\n" );
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document.write( "Test of H0:   1500 versus H1:   > 1500 <BR>\n" );
document.write( "Sample mean 1509.5 <BR>\n" );
document.write( "Std error of mean 4.854 \r<BR>\n" );
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document.write( "What is the test value that you would use to conduct this test </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #527703 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=527703\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> H0: mean = 1500 Claim<BR>\n" );
document.write( "H1: mean > 1500 <BR>\n" );
document.write( " Sample mean 1509.5 <BR>\n" );
document.write( " Std error of mean 4.854<BR>\n" );
document.write( "t-test Using 95% CI, (right handed only: .05) <BR>\n" );
document.write( " t = 9.5/(4.854/sqrt(25)) = 9.5/.9708<BR>\n" );
document.write( "P(t > 9.78574)= ~ 0,  basically 'off the charts'<BR>\n" );
document.write( "reject H0 </SPAN>\n" );
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