document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1078255>Question 1078255</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The time spent watching tv on a weekend by USC students is normally distributed with a<BR>\n" );
document.write( "      mean of 180 minutes and a standard deviation of 25 minutes. Find the probability that <BR>\n" );
document.write( "      such a student selected at random will spend\r<BR>\n" );
document.write( "\n" );
document.write( "         (a) More than 230 minutes watching tv					                    <BR>\n" );
document.write( "         (b) Less than 205 minutes watching tv					                    <BR>\n" );
document.write( "         (c) Between 130 minutes to 155 minutes of watching tv		                    <BR>\n" );
document.write( "         (d) More than 155 minutes of watching tv			<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 #692758 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=692758\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  The time spent watching tv on a weekend by USC students is normally distributed with amean of 180 minutes and a standard deviation of 25 minutes. Find the <BR>\n" );
document.write( " probability that such a student selected at random will spend <BR>\n" );
document.write( "(a) More than 230 minutes watching tv<BR>\n" );
document.write( "Find the z-value::<BR>\n" );
document.write( "z(230) = (230-180)/35 = 50/35 = 1.4286<BR>\n" );
document.write( "P(x > 230) = P(z > 1.4286) = normalcdf(1.4286,100) = 0.0066<BR>\n" );
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document.write( "Use the same procedure::<BR>\n" );
document.write( "Find the z-values ; then find the probability.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "---------------	<BR>\n" );
document.write( "(b) Less than 205 minutes watching tv	<BR>\n" );
document.write( "(c) Between 130 minutes to 155 minutes of watching tv	<BR>\n" );
document.write( "(d) More than 155 minutes of watching tv	 </SPAN>\n" );
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