document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=930112>Question 930112</A>: <I><SPAN STYLE=\"word-break: break-all;\"> help please!! \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "A random sample of 31 people employed by the Florida state authority established they earned an average wage (including benefits) of $56 per hour. The sample standard deviation was $6.35 per hour.<BR>\n" );
document.write( " \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "(a) What is your best estimate of the population mean? (Omit the \"$\" sign in your response.) \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "  Estimated population mean $    \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "(b) <BR>\n" );
document.write( "Develop a 99 percent confidence interval for the population mean wage (including benefits) for these employees. (Round your answers to 2 decimal places.)<BR>\n" );
document.write( " \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "  Confidence interval for the population mean wage is between  and . \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "(c) <BR>\n" );
document.write( "How large a sample is needed to assess the population mean with an allowable error of $2 at 95 percent confidence? (Round up your answer to the next whole number.)<BR>\n" );
document.write( " \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "  Sample size    <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #564704 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=564704\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sample: n = 31, mean = $56,  s = $6.35 <BR>\n" );
document.write( "a) Estimated population mean = $56<BR>\n" );
document.write( "b) ME =2.576(6.35/sqrt(31) = 2.94<BR>\n" );
document.write( "CI: $56±2.94,    (53.06, 58.94)<BR>\n" );
document.write( "c) n = (1.96(6.35)/2)^2 = 19.7580,   20 sample size (Always go to next Integer) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );