IBM Water System SPSS COMPLEX SAMPLES 19 Manuel d'utilisateur Page 57

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Complex Samples Ratios
Figure 8-1
Ratios dialog box
E Select at least one numerator variable and denominator variable.
Optionally, you can specify variables to dene su/jointfilesconvert/53841/bgroups for which statistics are produced.
Complex Sam ples Ratios Statistics
Figure 8-2
Ratios Statistics dialog box
Statistics. This group produces statistics associated with the ratio estimate.
Standard error. The standard error of the estimate.
Confidence interval. Acondence interval for the estimate, using the specied level.
Coefficient of variation. The ratio of the standard error of the estimate to the estimate.
Unweighted count. The number of units used to compute the estimate.
Population size. The estimated number of units in the population.
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