document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=930657>Question 930657</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1.	The Metropolitan Bus Company claims that the mean waiting time for a bus during rush hour is less than 5 minutes. A random sample of 20 waiting times has a mean of 3.2 minutes with a standard deviation of 2.1 minutes. At &#945; = 0.01, test the bus company's claim. Assume the pupulation is normally distributed.<BR>\n" );
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document.write( "	critical value t0 = -2.528; standardized test statistic &#8776; -3.833; do not reject H0; There is not sufficient evidence to support the Metropolitan Bus Company's claim.<BR>\n" );
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document.write( "	None of the above<BR>\n" );
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document.write( "	critical value t0 = -2.539; standardized test statistic &#8776; -0.287; do not reject H0; There is not sufficient evidence to reject the Metropolitan Bus Company's claim.<BR>\n" );
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document.write( "	critical value t0 = -2.539; standardized test statistic &#8776; -3.833; reject H0; There is sufficient evidence to support the Metropolitan Bus Company's claim.<BR>\n" );
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document.write( "	critical value t0 = -2.528; standardized test statistic &#8776;- 3.833; reject H0; There is sufficient evidence to reject the Metropolitan Bus Company's claim.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #565234 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=565234\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The Metropolitan Bus Company claims that the mean waiting time for a bus during rush hour is less than 5 minutes. A random sample of 20 waiting times has a mean of 3.2 minutes with a standard deviation of 2.1 minutes. At &#945; = 0.01, test the bus company's claim. Assume the pupulation is normally distributed.<BR>\n" );
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document.write( "Ho: u >= 5<BR>\n" );
document.write( "Ha: u < 5 (claim)<BR>\n" );
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document.write( "Critical value:: invNorm(0.01) = -2.3264<BR>\n" );
document.write( "Test stat:: t(3.2) = (3.2-5)/(2.1/sqrt(20)) = -3.833<BR>\n" );
document.write( "Since the test stat is in the reject interval, reject Ho.<BR>\n" );
document.write( "there is sufficient evidence to support the claim<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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