document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=805810>Question 805810</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A widely held opinion is that approximately 45% of college students wished they could dance.  Assuming the truth of that opinion let   equal the number of students in a random sample of size n=12  who wish they could dance.  Find the probability that<BR>\n" );
document.write( "(a)  x is at most 5,<BR>\n" );
document.write( "(b)  x is at least 6,<BR>\n" );
document.write( "(c)  x is equal to 7.<BR>\n" );
document.write( "(d)  Give the mean, variance, and standard deviation of x <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #485544 by </B><A HREF=/tutors/aboutme.mpl?userid=oscargut><B>oscargut(2103)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oscargut><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=oscargut><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=485544\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I do here part d)\r<BR>\n" );
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document.write( "mean = np = 12(0.45)5.4\r<BR>\n" );
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document.write( "variance = np(1-p) = 12(0.45)(0.55) = 2.97\r<BR>\n" );
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document.write( "st dev = sqrt(2.97) = 1.723\r<BR>\n" );
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document.write( "If you need more help today, you can contact me now at:\r<BR>\n" );
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document.write( "mthman@gmail.com\r<BR>\n" );
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document.write( "Thanks  </SPAN>\n" );
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