document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=412073>Question 412073</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The incubation time for Rhode Island Red chicks is normally distributed with a mean of 21 days (&#956;) and standard deviation (&#963;) of approximately 1 day.  If 1000 eggs are being incubated, how many chicks do we expect will hatch? \r<BR>\n" );
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document.write( "(a) In 19 to 23 days?<BR>\n" );
document.write( "(b) 21 days or few?\r<BR>\n" );
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document.write( "Format that I can understand is below:\r<BR>\n" );
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document.write( "Z = x–&#956; = <BR>\n" );
document.write( "     &#963;\r<BR>\n" );
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document.write( "Change (Z to X)(To checking and verifying information)<BR>\n" );
document.write( "X = Z &#963; + &#956;	X = (?.00)(1) + 21 (X =??)	\r<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 #289489 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=289489\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The incubation time for Rhode Island Red chicks is normally distributed with a mean of 21 days (&#956;) and standard deviation (&#963;) of approximately 1 day. If 1000 eggs are being incubated, how many chicks do we expect will hatch? <BR>\n" );
document.write( "(a) In 19 to 23 days?<BR>\n" );
document.write( "z(19) = (19-21)/1 = -2<BR>\n" );
document.write( "z(23) = (23-21)/1 = 2<BR>\n" );
document.write( "P(19 <= x <= 23) = P(-2 <= z <= 2) = 0.9545<BR>\n" );
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document.write( "(b) 21 days or few?<BR>\n" );
document.write( "P(x <= 21) = P(z <= 2) = normalcdf(-100,2) = 0.9773<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "<BR>\n" );
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document.write( " <BR>\n" );
document.write( "Format that I can understand is below: <BR>\n" );
document.write( "Z = x–&#956; = <BR>\n" );
document.write( "&#963; <BR>\n" );
document.write( "Change (Z to X)(To checking and verifying information)<BR>\n" );
document.write( "X = Z &#963; + &#956; X = (?.00)(1) + 21 (X =??) \r<BR>\n" );
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document.write( " </SPAN>\n" );
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