document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1198237>Question 1198237</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A magazine article states that in a study of 64 students, average teenager reads 5.5 books a year with a standard deviation  of 2 books.  What is the probability that the average teenager actually reads less than 5 books?\r<BR>\n" );
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document.write( "One of the following is the correct answer.  Which one?\r<BR>\n" );
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document.write( "A) 0.0228 (2.28%)<BR>\n" );
document.write( "B) 0.9772 (97%)<BR>\n" );
document.write( "C) 0.5987 (59.87%)<BR>\n" );
document.write( "D) 0.4013 (40.13%(<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 #831798 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=831798\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Normal Distribution (continuous curve)  µ = 5.5 and σ = 2<BR>\n" );
document.write( "probability that the average teenager actually reads less than 5 books?<BR>\n" );
document.write( "Using TI or similarly an inexpensive calculator like an Casio fx-115 ES plus<BR>\n" );
document.write( "P(x<5)  = normcdf(-9999,5,2,5.5) = .4013 <BR>\n" );
document.write( "0r<BR>\n" );
document.write( "area  to the 'left' of z = (5-5.5_/2 = -.25,  P(z<.25) = .4013<BR>\n" );
document.write( "Would include reading 4.5 books, for example<BR>\n" );
document.write( "IF the variable x < 5  needed to be a whole number:<BR>\n" );
document.write( "Then, p(x < 5 ) = p( x ≤ 4) = .2266 would work  </SPAN>\n" );
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