document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=867493>Question 867493</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an SRS of 75 incoming calls to a company's customer-service agents showed it took an average of 42.2 seconds for the agents to answer the calls with a standard deviation of 13.20 seconds. Give a 95 percent interval estimate for the mean amount of time it takes the agents to answer calls </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #523055 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=523055\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  an SRS of 75 incoming calls to a company's customer-service agents showed it took an average of 42.2 seconds for the agents to answer the calls with a standard deviation of 13.20 seconds. Give a 95 percent interval estimate for the mean amount of time it takes the agents to answer calls<BR>\n" );
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document.write( "sample mean = x-bar = 42.2 sec<BR>\n" );
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document.write( "Margin of Error = ER = 1.96*13.2/sqrt(75) = 2.987<BR>\n" );
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document.write( "95% CI: 42.2 - 2.987 < u < 42.2 + 2.987<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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