document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1147164>Question 1147164</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The freshness of a product at a superstore is rated on a scale of 1 to 5 with 5 being very fresh. From a random sample of 49 customers, the average score was 3.8. The standard deviation of this population is 0.7.\r<BR>\n" );
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document.write( "1. Obtain a 95% confidence interval for the population mean, μ, the mean score for the distribution of all possible customers. 	\r<BR>\n" );
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document.write( "2. Does μ  lie in your interval obtained in part (i)? Explain. 	<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 #768479 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=768479\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> interval is +/- z*sigma/sqrt (n) and for 95% CI, half-interval is 1.96*0.7/sqrt(49)<BR>\n" );
document.write( "This is 0.196<BR>\n" );
document.write( "the 95% CI is mu+/-0.196 or (3.60, 3.80) </SPAN>\n" );
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