document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1105212>Question 1105212</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Questions 15 through 19 build on each other: A local hospital claims its ED mean wait time is less than 45 minutes. A random selection of the wait times of 40 patients is captured and the sample mean wait time is 44 minutes with a sample standard deviation of 3.2 minutes. Assume they are approximately normally distributed. Is there enough evidence to support the claim at &#945;= 0.01? Use a P-value. Find the value of z using the  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #719961 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=719961\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Have to assume assumptions are met, and this is a t, since the std dev is of the sample and not of the population.<BR>\n" );
document.write( "t=(44-45)/3.2/sqrt(40)<BR>\n" );
document.write( "t=-1*sqrt(40)/3.2<BR>\n" );
document.write( "t=-1.97<BR>\n" );
document.write( "The critical value is |t|>2.67<BR>\n" );
document.write( "Fail to reject the hypothesis.  The claim is not supported. p-value is 0.055. </SPAN>\n" );
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