document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=780109>Question 780109</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A medical researcher says that at least 23% of adults are smokers. In a random sample 250 adults, 22.4% say they are smokers. At alpha=0.03, is there enough evidence to the reject the researcher's claim? What is critical value of zo? What is the standardized test static? What would be the correct conclusion of the test? Fail to reject or reject?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #475473 by </B><A HREF=/tutors/aboutme.mpl?userid=reviewermath><B>reviewermath(1029)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=reviewermath><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=reviewermath><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=475473\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Q:<BR>\n" );
document.write( "A medical researcher says that at least 23% of adults are smokers. In a random sample 250 adults, 22.4% say they are smokers. At alpha=0.03, is there enough evidence to the reject the researcher's claim? What is critical value of zo? What is the standardized test static? What would be the correct conclusion of the test? Fail to reject or reject? <BR>\n" );
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document.write( "A:<BR>\n" );
document.write( "Null Hypothesis, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=H%5B0%5D ALIGN=MIDDLE  ALT=\"H%5B0%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" >: p &#8805; 0.23<BR>\n" );
document.write( "Alternative Hypothesis, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=H%5B1%5D ALIGN=MIDDLE  ALT=\"H%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" >: p < 0.23<BR>\n" );
document.write( "&#945; = 0.03<BR>\n" );
document.write( "Critical Value: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z%5B.03%5D ALIGN=MIDDLE  ALT=\"z%5B.03%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > = -1.8808<BR>\n" );
document.write( "Test Stat: z = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%280.224-0.23%29%2Fsqrt%280.23%2A%281-0.23%29%2F250%29 ALIGN=MIDDLE  ALT=\"%280.224-0.23%29%2Fsqrt%280.23%2A%281-0.23%29%2F250%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = -0.2254<BR>\n" );
document.write( "Fail to reject <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=H%5B0%5D ALIGN=MIDDLE  ALT=\"H%5B0%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > because the test statistic is NOT lower than the critical value. Sample does NOT provide enough evidence to reject the medical researcher's claim. </SPAN>\n" );
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