data Schema
This table is always required.
| Column | Data Type | Description |
|---|---|---|
| input_column | Any | Data to sample. |
| stratum_column | Any | [Appears only when this is the only input table and you specify the StratumColumn argument.] Sampling conditions. |
summary Schema
This table is required for approximate sample sizes, disallowed otherwise.
| Column | Data Type | Description |
|---|---|---|
| input_column | Any | Data to sample. |
| stratum_column | Any | Sampling conditions. |
To approximate the target sample fractions well, the summary input must summarize the population statistics faithfully. That is, sum / stratum_count with a non-null stratum value must equal the total population size.