document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=904018>Question 904018</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Candidates for employment at a city fire department are required to take a written aptitude test.  Scores on this test are normally distributed with a mean of 260 and a standard deviation of 51.  A random sample of nine (9) test scores is taken. What is the probability that the sample mean score is less than 250? (express as a decimal, not a percentage </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #548459 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=548459\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> s = 51/sqrt(9) = 17<BR>\n" );
document.write( "t(250) = (250-260)/17 = -.588<BR>\n" );
document.write( "p-value =P(t< -.588 when df = 8) = tcdf(-100, -.588, 8) <BR>\n" );
document.write( "Recommend following references:<BR>\n" );
document.write( "http://stattrek.com/online-calculator/t-distribution.aspx<BR>\n" );
document.write( "for use of TI Calculator (Calculator a must)<BR>\n" );
document.write( "http://www.youtube.com/watch?v=S81bgxKI-cI </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );