document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=934918>Question 934918</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Birth weights at a local hospital have a normal distribution with a mean weight of 110 ounces and a standard deviation of 15 ounces. Using the unit normal table (and leaving off the percentage signs):\r<BR>\n" );
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document.write( "a. What percent of infants have weights greater than 120 ounces?   \r<BR>\n" );
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document.write( "b. What percent of infants have weights between 95 ounces and 125 ounces?   \r<BR>\n" );
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document.write( "c. What birth weight value separates the lowest 2.5% of infants from the rest?    </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #568073 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=568073\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> mean = 110 oz,  SD = 15 ounces, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z+=+blue%28x+-+110%29%2Fblue%2815%29 ALIGN=MIDDLE  ALT=\"z+=+blue%28x+-+110%29%2Fblue%2815%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
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document.write( "P( x > 120) = P( z > 10/15) = normalcdf( 2/3, 100)  = .2525<BR>\n" );
document.write( "P(95 < x < 125) = P( -15/15 <  z < 15/15) = normaldcdf(-1,1)= .6827<BR>\n" );
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document.write( " What birth weight value separates the lowest 2.5% of infants from the rest? <BR>\n" );
document.write( "z = invNorm(.025) = -1.96<BR>\n" );
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document.write( "(15)(-1.96) + 110 = x = 80.6 oz<BR>\n" );
document.write( "round as directed\r<BR>\n" );
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