document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=459474>Question 459474</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A light bulb manufacture guarantees that the mean life of bulbs is at least 750 hours. A random sample of 36 bulbs has a mean life of 745 with a standard deviation of 60 hours. At alpha = 0.02, do you have enough evidence to reject his claim? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #315099 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=315099\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=H%5B0%5D%3Amu%3E=750 ALIGN=MIDDLE  ALT=\"H%5B0%5D%3Amu%3E=750\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=%28m-mu%29%2Fsigma%5Bm%5D=%28745-750%29%2F%2860%2Fsqrt%2836%29%29=5%2F%2860%2F6%29=%285%2F10%29=-0.5 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "The rejection zone is below -2.05 at the .02 level.<BR>\n" );
document.write( "There is not enough evidence to reject the null hypothesis.<BR>\n" );
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document.write( "Ed  </SPAN>\n" );
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