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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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1330 RATIO STATISTICS<br />

MEAN Mean. The result of summing the ratios and dividing the result by the<br />

total number ratios.<br />

MEDIAN Median. The value such that number of ratios less than this value and<br />

the number of ratios greater than this value are the same.<br />

MIN Minimum. The smallest ratio.<br />

MNCOV Mean-centered coefficient of variation. The result of expressing the<br />

standard deviation as a percentage of the mean.<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 percentage of ratios that fall within<br />

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

greater 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 />

/PRINT = BCOC((0.5,0.9) (1.3,1.5)) WCOC(15 30 45) MEDIAN PRD<br />

• The median ratios and priced related differentials at each category of county are displayed.<br />

The overall median ratio and the overall price-related differential are also displayed.<br />

• Five coefficients of concentration are also displayed. The first two COC are percentages<br />

of ratios that fall into the intervals: (0.5, 0.9) and (1.3, 1.5). The next three COC are percentages<br />

of ratios that fall within 15% of the median, 30% of the median, and 45% of the<br />

median.

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