document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=579098>Question 579098</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average hourly wage of plumbers is normally distributed with a population mean of $32.00 and a population standard deviation of $6.00. Calculate the following:\r<BR>\n" );
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document.write( "(a) The proportion of plumbers earning between $20 and $24.<BR>\n" );
document.write( "(b) The proportion of plumbers earning more than $38.<BR>\n" );
document.write( "(c) The proportion of plumbers earning less than $15.<BR>\n" );
document.write( "(d) Calculated the 80th percentile. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #370880 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=370880\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a)<BR>\n" );
document.write( "z=(20-32)/6=-12/6=-2<BR>\n" );
document.write( "z=(24-32)/6=-8/6=-4/3<BR>\n" );
document.write( "Area under normal curve between -2 and -4/3 is .068  The proportion of plumbers earning between $20 and $24.<BR>\n" );
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document.write( "Ed </SPAN>\n" );
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