document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=126774>Question 126774</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780072966930/algebrahomeworkh>Applie Statics in Business and Econmics</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Question 9.56 from Applied Statics in Business and Economics Chapter 9<BR>\n" );
document.write( "I have looked and looked on getting this resolved and I am truelly stumped. Please any help or support. Thank you!!!<BR>\n" );
document.write( "A coin was flipped 60 times and came up heads 38 times. A. At the .10 level of signifiance, is the coin biased toward heads? Show your decision rule and calcualtions.<BR>\n" );
document.write( "B. Calculate a p-value and interpret it. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #92877 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=92877\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A coin was flipped 60 times and came up heads 38 times. A. At the .10 level of signifiance, is the coin biased toward heads? Show your decision rule and calculations.<BR>\n" );
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document.write( "Ho: p = 1/2<BR>\n" );
document.write( "Ha: p = 1/2<BR>\n" );
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document.write( "x = 38 ; n= 60; so p-hat = 38/60 = 0.63333<BR>\n" );
document.write( "alpha = 10% so the critical values for this <BR>\n" );
document.write( "two-tail test are z =-1.645,& +1.645<BR>\n" );
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document.write( "Test statistic:<BR>\n" );
document.write( "z(0.6333)= (0.6333-0.5)/sqrt[(0.6333)(0.3667)/60] = 0.1333/0.0622 =2.1426<BR>\n" );
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document.write( "Since the test statistic is greater than the critical value, reject Ho<BR>\n" );
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document.write( "B. Calculate a p-value and interpret it.<BR>\n" );
document.write( "p-value = 0.01607<BR>\n" );
document.write( "Interpretation: Only 1.6% of test results could have given stronger<BR>\n" );
document.write( "evidence that the coin is biased away from p=1/2.<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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