document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=128115>Question 128115</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Problem One:                            \r<BR>\n" );
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document.write( "      According to police records, from 1987 to 1995, the city of Davis, California experienced the following burglary rate (offenses per 1,000 residents for a given year):\r<BR>\n" );
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document.write( "(1) What is the mean burglary rate?\r<BR>\n" );
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document.write( "(2) What is the standard deviation of the burglary rate?\r<BR>\n" );
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document.write( "(3) What is the degree of freedom?\r<BR>\n" );
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document.write( "(4) What is the t-statistic @ 95% confidence?\r<BR>\n" );
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document.write( "(5) What is the standard error?\r<BR>\n" );
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document.write( "(6) What is the amount of error?\r<BR>\n" );
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document.write( "(7) What is the upper confidence bound per thousand offenses @ 95% confidence the mean annual burglary rate in Davis, California?\r<BR>\n" );
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document.write( "(8) What is the lower confidence bound per thousand offences @ 95% confidence the mean annual burglary rate in Davis, California?\r<BR>\n" );
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document.write( "Problem One: <BR>\n" );
document.write( "According to police records, from 1987 to 1995, the city of Davis, California experienced the following burglary rate (offenses per 1,000 residents for a given year): \r<BR>\n" );
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document.write( "year:  1987  data 15.8<BR>\n" );
document.write( "year:  1988 data 17.2<BR>\n" );
document.write( "year: 1989 data 16.5<BR>\n" );
document.write( "year: 1990 data 15.5<BR>\n" );
document.write( "year 1991 data 17.1<BR>\n" );
document.write( "year 1992 data 18.6<BR>\n" );
document.write( "year 1993 data 21.4<BR>\n" );
document.write( "year 1994 data 29.0<BR>\n" );
document.write( "year 1995 data 19.3\r<BR>\n" );
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document.write( "(1) What is the mean burglary rate? <BR>\n" );
document.write( "Add the numbers and divide by nine to get 18.9333<BR>\n" );
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document.write( "(2) What is the standard deviation of the burglary rate?<BR>\n" );
document.write( "I used a calculator to get: s = 4.2065<BR>\n" );
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document.write( "(3) What is the degree of freedom?<BR>\n" );
document.write( "9-1 = 8<BR>\n" );
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document.write( "(4) What is the t-statistic @ 95% confidence?<BR>\n" );
document.write( "t(18.9333) = (18.9333 - population mean)/[4.2065/(sqrt(9)]<BR>\n" );
document.write( "Comment: You did not include the population mean in your posting.<BR>\n" );
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document.write( "(5) What is the standard error? <BR>\n" );
document.write( "E = 1.96= 2.7482<BR>\n" );
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document.write( "(6) What is the amount of error?<BR>\n" );
document.write( "Not sure how that differs from (5)<BR>\n" );
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document.write( "(7) What is the upper confidence bound per thousand offenses @ 95% confidence the mean annual burglary rate in Davis, California? <BR>\n" );
document.write( "18.9333+2.7482<BR>\n" );
document.write( "(8) What is the lower confidence bound per thousand offences @ 95% confidence the mean annual burglary rate in Davis, California? <BR>\n" );
document.write( "18.9333-2.7482<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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