document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=390557>Question 390557</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assume that in a hypothesis test with null hypothesis 0 &#956; H : = 13.0 at a = 0.05, that a<BR>\n" );
document.write( "value of 11.0 for the sample mean results in the null hypothesis not being rejected. That<BR>\n" );
document.write( "corresponds to a confidence interval result of<BR>\n" );
document.write( "A) The 95% confidence interval for the mean does not contain the value 13.0<BR>\n" );
document.write( "B) The 95% confidence interval for the mean contains the value 11.0<BR>\n" );
document.write( "C) There is insufficient information to conclude whether the 95% confidence interval<BR>\n" );
document.write( "for the mean contains or does not contain the value 13.0<BR>\n" );
document.write( "D) The 95% confidence interval for the mean contains the value 13.0<BR>\n" );
document.write( " Nationwide, the average waiting time until electric utility customer service<BR>\n" );
document.write( "representative answers a call is 300 seconds per call. The Gigantic Kilowatt Energy<BR>\n" );
document.write( "Company took a sample of 35 calls and found that, on the average, they answered in 240<BR>\n" );
document.write( "seconds per call with a standard deviation of 50. Can the company claim that they are<BR>\n" );
document.write( "faster than the average utility?<BR>\n" );
document.write( "A) No, because –0.20 falls in the critical region<BR>\n" );
document.write( "B) Yes, because –7.10 falls in the critical region<BR>\n" );
document.write( "C) No, because –1.20 falls in the critical region<BR>\n" );
document.write( "D) Yes, because –0.20 falls in the critical region<BR>\n" );
document.write( "If the observed value is 4, the expected value is 5, and the standard error is 4, then the<BR>\n" );
document.write( "test value used for the z test is equal to<BR>\n" );
document.write( "A) –1.00 B) 0.25 C) –0.25 D) 1.00<BR>\n" );
document.write( "What is the critical t-value for a right-tailed test when a = .025and d.f. = 12?<BR>\n" );
document.write( "A) 0.695 B) 2.179 C) 2.831 D) 2.201<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 #276974 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=276974\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Assume that in a hypothesis test with null hypothesis Ho: u = 13.0 at a = 0.05, that a value of 11.0 for the sample mean results in the null hypothesis not being rejected. That corresponds to a confidence interval result of<BR>\n" );
document.write( "A) The 95% confidence interval for the mean does not contain the value 13.0<BR>\n" );
document.write( "B) The 95% confidence interval for the mean contains the value 11.0<BR>\n" );
document.write( "C) There is insufficient information to conclude whether the 95% confidence interval for the mean contains or does not contain the value 13.0<BR>\n" );
document.write( "D) The 95% confidence interval for the mean contains the value 13.0<BR>\n" );
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document.write( "Answer: A<BR>\n" );
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document.write( "Nationwide, the average waiting time until electric utility customer service<BR>\n" );
document.write( "representative answers a call is 300 seconds per call. <BR>\n" );
document.write( "The Gigantic Kilowatt Energy Company took a sample of 35 calls and found that, on the average, they answered in 240 seconds per call with a standard deviation of 50. Can the company claim that they are faster than the average utility?<BR>\n" );
document.write( "Ho: u = 300 <BR>\n" );
document.write( "Ha: u < 300 (claim)<BR>\n" );
document.write( "t(240) = (240-300)/[50/sqrt(35)] = -7.10<BR>\n" );
document.write( "A) No, because –0.20 falls in the critical region<BR>\n" );
document.write( "B) Yes, because –7.10 falls in the critical region<BR>\n" );
document.write( "C) No, because –1.20 falls in the critical region<BR>\n" );
document.write( "D) Yes, because –0.20 falls in the critical region<BR>\n" );
document.write( "Answer: B<BR>\n" );
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document.write( "If the observed value is 4, the expected value is 5, and the standard error is 4, then the test value used for the z test is equal to:<BR>\n" );
document.write( "z(4) = (4-5)/4 = -1/4<BR>\n" );
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document.write( "A) –1.00 B) 0.25 C) –0.25 D) 1.00<BR>\n" );
document.write( "Ans: C<BR>\n" );
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document.write( "What is the critical t-value for a right-tailed test when a = .025and d.f. = 12?<BR>\n" );
document.write( "A) 0.695 B) 2.179 C) 2.831 D) 2.201<BR>\n" );
document.write( "Ans: B<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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