document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1203121>Question 1203121</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Visits to Networking Sites A sample of 10 networking<BR>\n" );
document.write( "sites for a specific month has a mean of 26.1 and a<BR>\n" );
document.write( "standard deviation of 4.2. Find the 99% confidence<BR>\n" );
document.write( "interval of the true mean.\r<BR>\n" );
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document.write( "The sample mean symbol is x̄, pronounced “x bar”. \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n=10 ALIGN=MIDDLE  ALT=\"+n=10\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
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document.write( "x̄=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+26.1 ALIGN=MIDDLE  ALT=\"+26.1\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s=4.2 ALIGN=MIDDLE  ALT=\"+s=4.2\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "​\r<BR>\n" );
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document.write( "Two-sided confidence interval <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=CI ALIGN=MIDDLE  ALT=\"CI\"   DISABLED_style= \"max-width:90%; height:auto;\" > :\r<BR>\n" );
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document.write( "​<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++df=n-1=10-1=9 ALIGN=MIDDLE  ALT=\"++df=n-1=10-1=9\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++alpha=1-0.99=0.01 ALIGN=MIDDLE  ALT=\"++alpha=1-0.99=0.01\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++Z%5Bc_%28alpha%2F2%29%5D=Z%5Bc%280.005%29%5D=3.2498=3.25 ALIGN=MIDDLE  ALT=\"++Z%5Bc_%28alpha%2F2%29%5D=Z%5Bc%280.005%29%5D=3.2498=3.25\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+CI ALIGN=MIDDLE  ALT=\"+CI\"   DISABLED_style= \"max-width:90%; height:auto;\" >= (x̄-<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Z%5Bc%5D%2As%2Fsqrt%28n%29 ALIGN=MIDDLE  ALT=\"+Z%5Bc%5D%2As%2Fsqrt%28n%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, x̄+<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Z%5Bc%5D%2As%2Fsqrt%28n%29 ALIGN=MIDDLE  ALT=\"+Z%5Bc%5D%2As%2Fsqrt%28n%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >) \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=CI ALIGN=MIDDLE  ALT=\"CI\"   DISABLED_style= \"max-width:90%; height:auto;\" >= (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=26.1-%283.25%2A4.2%29%2Fsqrt%2810%29 ALIGN=MIDDLE  ALT=\"26.1-%283.25%2A4.2%29%2Fsqrt%2810%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+26.1%2B%283.25%2A4.2%29%2Fsqrt%2810%29 ALIGN=MIDDLE  ALT=\"+26.1%2B%283.25%2A4.2%29%2Fsqrt%2810%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=CI ALIGN=MIDDLE  ALT=\"CI\"   DISABLED_style= \"max-width:90%; height:auto;\" >= (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=26.1-4.3 ALIGN=MIDDLE  ALT=\"26.1-4.3\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=26.1%2B4.3 ALIGN=MIDDLE  ALT=\"26.1%2B4.3\"   DISABLED_style= \"max-width:90%; height:auto;\" >)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=CI ALIGN=MIDDLE  ALT=\"CI\"   DISABLED_style= \"max-width:90%; height:auto;\" >= (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=21.8 ALIGN=MIDDLE  ALT=\"21.8\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30.4 ALIGN=MIDDLE  ALT=\"30.4\"   DISABLED_style= \"max-width:90%; height:auto;\" >)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=99 ALIGN=MIDDLE  ALT=\"99\"   DISABLED_style= \"max-width:90%; height:auto;\" >% confidence interval:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=21.8+%3CCI+%3C+30.4 ALIGN=MIDDLE  ALT=\"21.8+%3CCI+%3C+30.4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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