document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=300090>Question 300090</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4.      Chicken Delight claims that 90 percent of its orders are delivered within 10 minutes of the time the order is placed. A sample of 100 orders revealed that 82 were delivered within the promised timeframe.  At the 0.10 significance level, can we conclude that less than 90 percent of the orders are delivered in 10 minutes or less? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #215442 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=215442\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Chicken Delight claims that 90 percent of its orders are delivered within 10 minutes of the time the order is placed. <BR>\n" );
document.write( "A sample of 100 orders revealed that 82 were delivered within the promised timeframe. <BR>\n" );
document.write( "At the 0.10 significance level, can we conclude that less than 90 percent of the orders are delivered in 10 minutes or less?<BR>\n" );
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document.write( "Ho: p = 0.90 (claim)<BR>\n" );
document.write( "Ha: p < 0.90<BR>\n" );
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document.write( "sample proportion: 0.82<BR>\n" );
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document.write( "test statistic: z(0.82) = (0.82-0.90)/sqrt[0.9*0.1/100] = -2.667<BR>\n" );
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document.write( "critical values: z =  +-1.645<BR>\n" );
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document.write( "Conclusion: Since the ts is in the reject interval, reject Ho.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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