document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1198313>Question 1198313</A>: <I><SPAN STYLE=\"word-break: break-all;\"> there is a class of 25 students and the mean score of their test is 60 out 100, with a standard deviation of 4 marks from the mean. While other students of that school have a mean score of 50 on the same test. what will be the t-score for calculating the probability that the school students scored not less than 60 in their test? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #831905 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=831905\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  n = 25, x̄ = 60 , s = 4<BR>\n" );
document.write( "Ho:  m ≥ 60<BR>\n" );
document.write( "Ha:  m < 60<BR>\n" );
document.write( "one-tailed<BR>\n" );
document.write( "other students of that school have a mean score of 50 on the same test<BR>\n" );
document.write( "t = (50-60)/4/5 = -12.5 </SPAN>\n" );
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