document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=962979>Question 962979</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 40 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that &#963; = 7.00 ml/kg for the distribution of blood plasma. <BR>\n" );
document.write( "(a) Find a 99% confidence interval for the population mean blood plasma volume in male firefighters. What is the margin of error? (Round your answers to two decimal places.) <BR>\n" );
document.write( "lower limit?         <BR>\n" );
document.write( "upper limit?         <BR>\n" );
document.write( "margin of error?<BR>\n" );
document.write( "(d) Find the sample size necessary for a 99% confidence level with maximal error of estimate E = 2.60 for the mean plasma volume in male firefighters. (Round up to the nearest whole number.)<BR>\n" );
document.write( "_______  male firefighters         <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 #588354 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=588354\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose that a random sample of 40 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that &#963; = 7.00 ml/kg for the distribution of blood plasma. <BR>\n" );
document.write( "(a) Find a 99% confidence interval for the population mean blood plasma volume in male firefighters. What is the margin of error? (Round your answers to two decimal places.) <BR>\n" );
document.write( "lower limit?:: x-bar - inv(Norm0.995)s/sqrt(n) = 37.5-2.5758*(7/sqrt(40)) <BR>\n" );
document.write( "upper limit?:: 37.5+2.5758*(7/sqrt(40))<BR>\n" );
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document.write( "margin of error? 2.5758*(7/sqrt(40))<BR>\n" );
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document.write( " (d) Find the sample size necessary for a 99% confidence level with maximal error of estimate E = 2.60 for the mean plasma volume in male firefighters. (Round up to the nearest whole number.)<BR>\n" );
document.write( "n = [2.5758*7/2.6]^2 = 49 when rounded up<BR>\n" );
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document.write( " 49 male firefighters <BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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