document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=281078>Question 281078</A>: <I><SPAN STYLE=\"word-break: break-all;\"> About 70% of the students at Fairview Technical College favor a new policy regarding parking on campus. Suppose we are interested in the proportion of 50 students in a matt class who favor the poilcy.<BR>\n" );
document.write( "What is the probability that the proportion of the class who favor the poilcy is one-half or more?\r<BR>\n" );
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document.write( "What is the probability that the proportion of the class who favor the policy is between 60% and 80%?\r<BR>\n" );
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document.write( "What is the probability that the proportion of the class who favor the policy is less than 60%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #204205 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=204205\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> About 70% of the students at Fairview Technical College favor a new policy regarding parking on campus. Suppose we are interested in the proportion of 50 students in a matt class who favor the poilcy.<BR>\n" );
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document.write( "Sketch a Normal curve with \"p\" as the label of the horizontal axis.<BR>\n" );
document.write( "Put 0.7 on a middle-point of the axis.<BR>\n" );
document.write( "Put sqrt(0.7*0.3/50) = 0.0648 under 0.7 so you remember the standard deviation.<BR>\n" );
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document.write( "What is the probability that the proportion of the class who favor the policy is one-half or more?<BR>\n" );
document.write( "z(0.5) = (0.5-0.7)/0.0648 = -3.0864<BR>\n" );
document.write( "P(phat >=0.5)= P(z > -3.0864) = 0.9990<BR>\n" );
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document.write( "What is the probability that the proportion of the class who favor the policy is between 60% and 80%?<BR>\n" );
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document.write( "z(0.6) = (0.6-0.7)/0.0648 = -1.5432<BR>\n" );
document.write( "z(0.8) = 1.5432<BR>\n" );
document.write( "P(0.6 < phat <0.8) = P(-1.5432 < z < 1.5432) = 0.8772<BR>\n" );
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document.write( "What is the probability that the proportion of the class who favor the policy is less than 60%?<BR>\n" );
document.write( "Can you handle this now?<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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