CALCULATE SUMMARY STATS AND RELIABILITY INTERVAL LIMITS IN A TABLE¶
Computes summary statistics (mean, standard deviation, min, max, range) and statistical tolerance interval limits for one or more numeric dataset columns using a normal-distribution model. For each selected column it returns lower and upper interval limits at the specified confidence level (alpha) and reliability proportion (p), plus the percentage of values that fall outside those limits. Use this worker when you need a tabular reliability summary following NIST guidelines (NIST/SEMATECH e-Handbook §PRC.2.6.3).
When to use¶
Tagged: confidence_level, dataset, nist, normal_distribution, one_sided, reliability_interval, summary_statistics, tolerance_interval.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Dataset | dataset | dataset | — | ✓ | Input dataset (table of numeric columns) for which tolerance intervals will be computed; must be a structured dataset object — at least one numeric column is required. |
| input_columns | input_columns | text | — | One or more numeric column names from the input dataset to analyze; leave blank to process all numeric columns. Supply as a comma-separated list or a multi-select list. | |
| alpha | alpha | text | — | Confidence level for the tolerance interval, expressed as a proportion between 0 and 1 (e.g., 0.90 for 90 %); defaults to 0.90 if omitted. | |
| p | p | text | — | Reliability (coverage) proportion — the minimum fraction of the population that the interval must contain (e.g., 0.95 for 95 %); defaults to 0.95 if omitted. | |
| sides | sides | text | — | Which interval bound(s) to compute: ‘two’ for a two-sided interval (default), ‘lower’ for a lower one-sided bound only, or ‘upper’ for an upper one-sided bound only. |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| Output Reliability Interval Limits Table | dataset | dataset | Output table with one row per selected column, containing: column name, sample size (n), mean, standard deviation, min, max, range, lower_interval_limit, upper_interval_limit, and percentage_crossing_interval_limits (fraction of values outside the computed tolerance limits). |
Disciplines¶
- data.statistics
- design_exploration.reliability
Runnable example¶
A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: /api/workflow/example?id=dataset_get_tolerance_interval_table
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