document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1048248>Question 1048248</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi there, I'm really stuck on this problem and could use your help!\r<BR>\n" );
document.write( "\n" );
document.write( "Mimi made a random guess at 10 true-or-false questions. Let x be the number of correct answers she got. We know that x follows a binomial distribution.<BR>\n" );
document.write( " <BR>\n" );
document.write( "Could you identify n (number of trials), p (probability of success) and q (probability of failure) for this binomial distribution? \r<BR>\n" );
document.write( "\n" );
document.write( "In addition, what is the expected value (&#956;) and standard deviation (&#963;), respectively?\r<BR>\n" );
document.write( "\n" );
document.write( "Any help on this would be greatly appreciated!<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #663844 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=663844\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> p=0.50, q=0.50, n=10<BR>\n" );
document.write( ":<BR>\n" );
document.write( "expected value is np = 10 * 0.50 = 5<BR>\n" );
document.write( ":<BR>\n" );
document.write( "std. dev. is square root(npq) = square root(10*0.50*0.50) = 1.58<BR>\n" );
document.write( ":<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );