document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=872600>Question 872600</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Question text<BR>\n" );
document.write( "Calculate the minimum sample size for a study of the cost of 1 full year (tuition as well as room and board) when the level of confidence is 99%, the standard deviation is $1000 and the allowable error is $1600.<BR>\n" );
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document.write( "Enter your response as a whole number.<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 #526245 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=526245\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ME = z*s/sqrt(n)\r<BR>\n" );
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document.write( "ME*sqrt(n) = z*s\r<BR>\n" );
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document.write( "sqrt(n) = z*s/ME\r<BR>\n" );
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document.write( "n = (z*s/ME)^2\r<BR>\n" );
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document.write( "n = (2.576*1000/1600)^2 ... z = 2.576 is found using a table (critical value for 99% confidence interval)\r<BR>\n" );
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document.write( "n = 2.5921\r<BR>\n" );
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document.write( "n = 3 ... round UP to the nearest whole number\r<BR>\n" );
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document.write( "The min sample size is 3<BR>\n" );
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