document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=23901>Question 23901</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Here is my question please help...\r<BR>\n" );
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document.write( "A research study on the calorie intake of 2300 women found that the mean calorie intake was 1650 calories per day. The data were normally distributed with a standard deviation of 175 calories. How many women in the study at between 1300 and 2000 calories a day?\r<BR>\n" );
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document.write( "Thats all i have no idea how to find the anwser so some help would be nice. Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #20905 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=20905\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Draw the normal curve putting 1650 at the mean; sigma=175 and<BR>\n" );
document.write( "label the horizontal axis as \"x\".<BR>\n" );
document.write( "You want to find Prob(1300<x<2000)<BR>\n" );
document.write( "Either use a TI-83 calculator to find this directly <BR>\n" );
document.write( "or convert the 1300 and the 2000 to \"z-scores\", as follows:<BR>\n" );
document.write( "z(1300)=[1300=1650]/175= -2<BR>\n" );
document.write( "z(2000)=[2000-1650]/175= +2<BR>\n" );
document.write( "Now your problem becomes Prob(-1<z<2)= ?<BR>\n" );
document.write( "Use your z-chart to find Prob(0<z<2) and double it.<BR>\n" );
document.write( "I get an answer of 2*0.47725=0.9545~ 95.5%<BR>\n" );
document.write( "So the Probability you are looking for is approx.  95.5%<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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