document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=190959>Question 190959</A>: <I><SPAN STYLE=\"word-break: break-all;\"> NEED HELP ASAP ON THIS!!! PLEASE PLEASE?? THANK YOU SO MUCH!!\r<BR>\n" );
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document.write( "A U.S. dime is supposed to weigh 2.268 grams. A random sample of 15 circulated dimes showed a mean weight of 2.256 grams with a standard deviation of .026 grams. Using &#945; = .05, is the mean weight of all circulated dimes lower than the specification? Explain your decision. \r<BR>\n" );
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document.write( "Hypothesis Test: Mean vs. Hypothesized Value<BR>\n" );
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document.write( "	2.26800 	hypothesized value		<BR>\n" );
document.write( "	2.25600 	mean Sample data		<BR>\n" );
document.write( "	0.02600 	std. dev.			<BR>\n" );
document.write( "	0.00671 	std. error			<BR>\n" );
document.write( "	15  	n			<BR>\n" );
document.write( "	14  	df			<BR>\n" );
document.write( "					<BR>\n" );
document.write( "	-1.79	 t			<BR>\n" );
document.write( "	.0478	 p-value (one-tailed, lower)	<BR>\n" );
document.write( "					<BR>\n" );
document.write( "	2.24160 	confidence interval 95.% lower	<BR>\n" );
document.write( "	2.27040 	confidence interval 95.% upper	<BR>\n" );
document.write( "	0.01440 	   half-width		<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 #143371 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=143371\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A U.S. dime is supposed to weigh 2.268 grams. A random sample of 15 circulated dimes showed a mean weight of 2.256 grams with a standard deviation of .026 grams. Using &#945; = .05, is the mean weight of all circulated dimes lower than the specification? Explain your decision. <BR>\n" );
document.write( "Hypothesis Test: Mean vs. Hypothesized Value\r<BR>\n" );
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document.write( "2.26800 hypothesized value <BR>\n" );
document.write( "2.25600 mean Sample data <BR>\n" );
document.write( "0.02600 std. dev. <BR>\n" );
document.write( "0.00671 std. error <BR>\n" );
document.write( "15 n <BR>\n" );
document.write( "14 df \r<BR>\n" );
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document.write( "Ho: u = 2.268<BR>\n" );
document.write( "Ha: u < 2.268<BR>\n" );
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document.write( "test statistic: t = -1.79 t <BR>\n" );
document.write( "p-value = 0.0478 p-value (one-tailed, lower)<BR>\n" );
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document.write( "Conclusion:<BR>\n" );
document.write( "Since the p-value is lessthan 5%, reject Ho.<BR>\n" );
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document.write( " \r<BR>\n" );
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document.write( "2.24160 confidence interval 95.% lower <BR>\n" );
document.write( "2.27040 confidence interval 95.% upper <BR>\n" );
document.write( "0.01440 half-width <BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "StanH.<BR>\n" );
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