document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1136580>Question 1136580</A>: <I><SPAN STYLE=\"word-break: break-all;\">  A sample of 36 dieters are in a weight lost program. People who do this program typically loss 40 lbs of weight (with a standard deviation of 12). This sample of dieters lost 45 lbs. Obtain the z score for this sample. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #754374 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=754374\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> population mean is loss of 40 pounds on the average.<BR>\n" );
document.write( "population standard deviation is plus or minus 12 pounds on the average.\r<BR>\n" );
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document.write( "sample size is 36.\r<BR>\n" );
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document.write( "standard deviation of sample means is 12 / sqrt(36) = 12 / 6 = 2\r<BR>\n" );
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document.write( "z-score for this sample of 36 dieters is (45 - 40) / 2 = 5/2 = 2.5.\r<BR>\n" );
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document.write( "the z-score formula is z = (x-m)/s\r<BR>\n" );
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document.write( "z is the z-score<BR>\n" );
document.write( "x is the sample mean.<BR>\n" );
document.write( "m is the population mean.<BR>\n" );
document.write( "s is the standard deviation of the distribution of sample means.\r<BR>\n" );
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document.write( "formula for standard deviation of sample means is s = standard deviation of the population divided by the square root of the sample size.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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