document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=853653>Question 853653</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help please, I cannot figure this out. thank you.\r<BR>\n" );
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document.write( "At a large college, the probability that students are from Ohio is 4%.  A random sample of 20 students from the college is selected.  Let X denote the number of students from Ohio among them.\r<BR>\n" );
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document.write( "Using the Normal Approximation to the Binomial Distribution...\r<BR>\n" );
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document.write( "The mean of X is:<BR>\n" );
document.write( "The standard deviation of X is:<BR>\n" );
document.write( "The probability that X is at least 1 is:\r<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 #514179 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=514179\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> At a large college, the probability that students are from Ohio is 4%. <BR>\n" );
document.write( "A random sample of 20 students from the college is selected. <BR>\n" );
document.write( "Let X denote the number of students from Ohio among them.<BR>\n" );
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document.write( "Using the Normal Approximation to the Binomial Distribution... <BR>\n" );
document.write( "The mean of X is: np = 20*0.04 = 0.8<BR>\n" );
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document.write( "The standard deviation of X is: sqrt(npq) = sqrt(0.8*0.96) = 0.8764<BR>\n" );
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document.write( "The probability that X is at least 1 is:<BR>\n" );
document.write( "P(X at least 1) = 1 - P(X = 0) = 1-(0.96)^20 = 0.558<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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