document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1089634>Question 1089634</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It is estimated that the average annual salary for a registered nurse is $46,000 with a standard deviation of $1,800. If 9 random samples of 40 nurses each are randomly selected, the probability that the average salary of one of these samples is less than $45,000 is\r<BR>\n" );
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document.write( "A. 0.0002<BR>\n" );
document.write( "B. 0.0478<BR>\n" );
document.write( "C. 0.2782<BR>\n" );
document.write( "D. 0.7218 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #704271 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=704271\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=(xbar-mean)/sigma/sqrt(n)<BR>\n" );
document.write( "z < (45000-46000)/1800/sqrt(40)<BR>\n" );
document.write( "z < -1000*sqrt(40)/1800=-3.51<BR>\n" );
document.write( "That probability for one sample is 0.00022<BR>\n" );
document.write( "A.<BR>\n" );
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