document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=682799>Question 682799</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4)	The amount of Jen’s monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $10.  Find the 25th percentile. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #423366 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=423366\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The amount of Jen’s monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $10. Find the 25th percentile.<BR>\n" );
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document.write( "Find the z-value with a left tail of 25%:<BR>\n" );
document.write( "invNorm(0.25) = -0.6745<BR>\n" );
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document.write( "Find the corresponding phone bill using x = z*s+u<BR>\n" );
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document.write( "x = -0.6745*10 + 50 = $43.26<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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