document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=162178>Question 162178</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0618632271/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> a pain relief drug is normally distributed with mean 2 hours and standard deviation 0.3 hour.  For a patient selected at random:<BR>\n" );
document.write( "	a)  What is the probability that the drug will be effective for 2 hours or less?<BR>\n" );
document.write( "	b)  What is the probability that the drug will be effective for 1 hour or less?<BR>\n" );
document.write( "	c)  What is the probability that the drug will be effective for 3 hours or more?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #119578 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=119578\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use the z score, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=%28x-mu%29%2Fsigma ALIGN=MIDDLE  ALT=\"z=%28x-mu%29%2Fsigma\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "with x=the value you're interested in, <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=mu ALIGN=MIDDLE  ALT=\"mu\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the mean<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sigma ALIGN=MIDDLE  ALT=\"sigma\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the standard deviation.<BR>\n" );
document.write( "Then use a lookup table, calculator, or NORMSDIST in Excel.<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "a) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=%282-2%29%2F0.3=0 ALIGN=MIDDLE  ALT=\"z=%282-2%29%2F0.3=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >, p=0.5<BR>\n" );
document.write( "b) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=%281-2%29%2F0.3=-3.333 ALIGN=MIDDLE  ALT=\"z=%281-2%29%2F0.3=-3.333\"   DISABLED_style= \"max-width:90%; height:auto;\" >, p=0.000429<BR>\n" );
document.write( "c) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=%283-2%29%2F0.3=3.333 ALIGN=MIDDLE  ALT=\"z=%283-2%29%2F0.3=3.333\"   DISABLED_style= \"max-width:90%; height:auto;\" >, p=0.999571, <BR>\n" );
document.write( "Also, p=1-0.000429=0.999571 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );