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Two-Sided Normal Z P-Value Calculator — result sheet
Calculate the two-sided standard-normal tail probability associated with a z statistic.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Two-sided p-value=2×[1−Φ(|z|)].
The absolute z distance is converted to both normal tails and the two-sided probability is returned.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Z statistic — minimum -12; maximum 12
Worked example
| Input | Value |
|---|---|
| Z statistic | 1.96 |
Two-sided p-value ≈0.05.
Assumptions and limits
- The supplied statistic is compared with a standard normal reference distribution.
- A two-sided tail convention is requested.
- Study design, multiple testing, effect size, stopping rules, and decision thresholds are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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