document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1130178>Question 1130178</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A n A newborn baby has extremely low birth weight (ELBW) if it weighs less than 1000 grams. A study of the health of such children in later years examined a random sample of 219 children. Their mean weight at birth was x¯= 810 grams. This sample mean is an unbiased estimator of the mean weight &#956; in the population of all ELBW babies. This means that \r<BR>\n" );
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document.write( "A. the sample mean x¯ will have a distribution that is close to Normal.  <BR>\n" );
document.write( "B. the average sample mean x¯, over all possible samples, is equal to &#956;. <BR>\n" );
document.write( "C. the sample mean x¯ is always equal to &#956;.  <BR>\n" );
document.write( "D. None of the above.<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 #747098 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=747098\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> B.<BR>\n" );
document.write( "Unbiased estimator means that the mean of every possible sample of a given size will equal the parameter being estimated, or here the true mean. <BR>\n" );
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