document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=564210>Question 564210</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A field researcher is gathering data on the trunk diameters of mature pine and spruce trees in a certain area. The following are the results of his random sampling. Can he conclude, at the .10 level of significance, that the average trunk diameter of a pine tree is greater than the average diameter of a spruce tree?<BR>\n" );
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document.write( "Sample size<BR>\n" );
document.write( "Pine 40<BR>\n" );
document.write( "Spruce 70\r<BR>\n" );
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document.write( "Mean trunk diameter (cm)<BR>\n" );
document.write( "Pine 45<BR>\n" );
document.write( "Spruce 39\r<BR>\n" );
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document.write( "Sample variance<BR>\n" );
document.write( "Pine 100<BR>\n" );
document.write( "Spruce 150\r<BR>\n" );
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document.write( "A. The data do not support the claim because the test value 1.29 is greater than 1.28.	\r<BR>\n" );
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document.write( "B. The data support the claim because the test value 2.78 is greater than 1.28.	\r<BR>\n" );
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document.write( "C. The data support the claim because the test value 2.78 is greater than 1.64.	\r<BR>\n" );
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document.write( "D. The data do not support the claim because the test value 1.29 is less than 1.64.\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 #365278 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=365278\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Answer: B\r<BR>\n" );
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document.write( "I ran a 2-Sample Ttest on my TI-84<BR>\n" );
document.write( "and got the following:<BR>\n" );
document.write( "test stat: t = 2.7846<BR>\n" );
document.write( "Critcal value: inT(0.90,9504) = 1.29<BR>\n" );
document.write( "p-value: 0.0065<BR>\n" );
document.write( "df:  95.04<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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