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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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RATIO STATISTICS 1329<br />

PRD Price-related differential. Also known as the index of regressivity, the<br />

result of dividing the mean by the weighted mean.<br />

RANGE Range. The result of subtracting the minimum ratio from the<br />

maximum ratio.<br />

STDDEV Standard deviation. The result of summing the squared deviations of<br />

the ratios about the mean, dividing the result by the total number of<br />

ratios minus one, and taking the positive square root.<br />

WCOC(value list) Coefficient of concentration. The percent of ratios that fall within the<br />

specified percent of the median. Specify a list of values that are greater<br />

than 0 and less than 100.<br />

WGTMEAN Weighted mean. The result of dividing the mean of the numerator by<br />

the mean of the denominator. It is also the mean of the ratios weighted<br />

by the denominator.<br />

Example<br />

RATIO STATISTICS appraise WITH price BY county<br />

/OUTFILE(’C:\PropertyTax\Ratio.sav’) = CIN(90) MEDIAN.<br />

• The median ratios and their 90% confidence intervals at each category of county are saved<br />

to C:\PropertyTax\Ratio.sav.<br />

• The overall median ratio and its 90% confidence intervals are also saved.<br />

PRINT Subcommand<br />

PRINT displays optional output. If no PRINT subcommand is specified, only a case processing<br />

summary table is displayed by default.<br />

AAD Average absolute deviation. The result of summing the absolute deviations<br />

of the ratios about the median and dividing the result by the total<br />

number of ratios.<br />

BCOC(low,high) …) Coefficient of concentration. The percentage of ratios that fall into an<br />

interval. Pairs of low and high values enclosed in parentheses specify<br />

the intervals.<br />

CIN(a) Confidence interval. Specifying this keyword displays confidence<br />

intervals for the mean, median, and weighted mean (if those statistics<br />

are requested). Specify a value greater than or equal to 0 and less than<br />

100 as the confidence level.<br />

COD Coefficient of dispersion. The result of expressing the average absolute<br />

deviation as a percentage of the median.<br />

MAX Maximum. The largest ratio.<br />

MDCOV Median-centered coefficient of variation. The result of expressing the<br />

root mean squares of deviation from the median as a percentage of the<br />

median.

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