document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1182324>Question 1182324</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average annual salary for all the US teachers is $47,750. Assume that the distribution is normal and the standard deviation is $5680. Find that probability that a randomly selected teacher earns between $35,000 and $45,000 a year.''. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #812331 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=812331\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=(x-mean)/sd<BR>\n" );
document.write( "so z=(35000-47750)/5680=-2.24<BR>\n" );
document.write( "and (45000-47750)/5680=-0.48<BR>\n" );
document.write( "this probability is 0.3031. exact is 0.3017 when z is not rounded 2ndVARS2normalcdf(35000,35000,47750,5680)ENTER </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );