document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=746211>Question 746211</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Binomial and Normal Distribution\r<BR>\n" );
document.write( "\n" );
document.write( "In a certain normal distribution of scores, the mean is 40 and the standard deviation is 4. Find the z-score corresponding to a score of 43. What percentage of scores were below 43?\r<BR>\n" );
document.write( "\n" );
document.write( "Thanks for your help! I just don't understand the formula.<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 #454189 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=454189\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a certain normal distribution of scores, the mean is 40 and the standard deviation is 4. Find the z-score corresponding to a score of 43. What percentage of scores were below 43?<BR>\n" );
document.write( "----<BR>\n" );
document.write( "How far is 43 from the mean?: 43-40 = 3<BR>\n" );
document.write( "How many standard deviations is that?: 3/4 of a std.<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Using the normal distribution model:<BR>\n" );
document.write( "P(x < 43) = P(z < 3/4) = 0.773<BR>\n" );
document.write( "=================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================== <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );