document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=263979>Question 263979</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A random sample of 100 patients taken at a community hospital shows the mean time for a patient to see a physician is 25 minutes with a standard deviation of 6 minutes.\r<BR>\n" );
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document.write( " a What proportion of patients will be seen by an ER physician in less than 20 minutes?\r<BR>\n" );
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document.write( "b What proportion of patients will be seen by an ER physician between 25 and 30 minutes?\r<BR>\n" );
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document.write( "Completing in Excel and I want to make sure I am on the right track. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #194444 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=194444\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A random sample of 100 patients taken at a community hospital shows the mean time for a patient to see a physician is 25 minutes with a standard deviation of 6 minutes.<BR>\n" );
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document.write( "a What proportion of patients will be seen by an ER physician in less than 20 minutes?<BR>\n" );
document.write( "z(20) = (20-25)/[6]= -0.83333<BR>\n" );
document.write( "P(x< 20) = P(z < -0.83333) = 0.2023..<BR>\n" );
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document.write( "b What proportion of patients will be seen by an ER physician between 25 and 30 minutes?<BR>\n" );
document.write( "z(25) = 0<BR>\n" );
document.write( "z(30) = 0.8333<BR>\n" );
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document.write( "P(25< x < 30) = P(0< z < 0.83333) = 0.2977..<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
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