document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1131883>Question 1131883</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can I get help in solving this problem?<BR>\n" );
document.write( "a. For classes of 222 students, find the mean and standard deviation for the number born on the 4th of July. Ignore leap years.<BR>\n" );
document.write( "b. For a class of 222 students, would two be an unusually high number who was born on the 4th of July?<BR>\n" );
document.write( "a. The value of the mean is &#956; =<BR>\n" );
document.write( " (Round to six decimal places as needed.)<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 #748595 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=748595\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> probability is (1/365)<BR>\n" );
document.write( "so mean is np=222/365 or 0.608219<BR>\n" );
document.write( "variance is np(1-p)=0.608*(364/365)=0.606<BR>\n" );
document.write( "sd is sqrt(V)=0.78<BR>\n" );
document.write( "probability two are born on that day is within 2 sd s of the mean<BR>\n" );
document.write( "it is 365C2*(1/365)^2*(364/365)^220<BR>\n" );
document.write( "=0.2727,  Not at all unlikely.  <BR>\n" );
document.write( "Can use 6 decimal places for the others; question wasn't clear to which it  applied. </SPAN>\n" );
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