document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1206865>Question 1206865</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assuming the population has an approximate normal distribution, if a sample size <BR>\n" );
document.write( "n=28 has a sample mean x¯=39 with a sample standard deviation s=2, find the margin of error at a 80% confidence level. Round the answer to two decimal places. </SPAN>\n" );
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document.write( "Margin of error =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Z+%2A+%28mu+%2F+sqrt%28n%29%29 ALIGN=MIDDLE  ALT=\"+Z+%2A+%28mu+%2F+sqrt%28n%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Where:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Z ALIGN=MIDDLE  ALT=\"Z\"   DISABLED_style= \"max-width:90%; height:auto;\" > is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Z ALIGN=MIDDLE  ALT=\"Z\"   DISABLED_style= \"max-width:90%; height:auto;\" >-score corresponding to the desired confidence level (for a <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=80 ALIGN=MIDDLE  ALT=\"80\"   DISABLED_style= \"max-width:90%; height:auto;\" >% confidence level, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Z ALIGN=MIDDLE  ALT=\"Z\"   DISABLED_style= \"max-width:90%; height:auto;\" > ≈ <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1.282 ALIGN=MIDDLE  ALT=\"1.282\"   DISABLED_style= \"max-width:90%; height:auto;\" >)\r<BR>\n" );
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document.write( "a sample size <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n=28+ ALIGN=MIDDLE  ALT=\"n=28+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a sample mean x¯=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=39 ALIGN=MIDDLE  ALT=\"39\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=mu=39 ALIGN=MIDDLE  ALT=\"mu=39\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a sample standard deviation <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s=2 ALIGN=MIDDLE  ALT=\"s=2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Margin of error = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1.282+%2A+%2839+%2F+sqrt%2828%29%29 ALIGN=MIDDLE  ALT=\"1.282+%2A+%2839+%2F+sqrt%2828%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Margin of error =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1.282+%2A+%287.37030722367993%29 ALIGN=MIDDLE  ALT=\"+1.282+%2A+%287.37030722367993%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Margin of error = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9.45 ALIGN=MIDDLE  ALT=\"9.45\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
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