P-value Calculator — Statistical Significance from Z & T Test Scores
Compute p-values from Z-scores or T-scores for one-tailed and two-tailed hypothesis tests. Free online calculator with formula guide and step-by-step results.
P-value Calculator — Statistical Si
Results below
Enter Values
Significance Level (α)
0.01
Confidence Level
99%
Critical Value (one-tailed)
2.326
Statistically Significant?
▼ No
Action
Fail to reject the null hypothesis H₀
Evidence Strength
Moderate evidence against the null hypothesis
Conclusion
Since p = 0.016586 ≥ α = 0.01, the results are not statistically significant. You fail to reject the null hypothesis. Moderate evidence against the null hypothesis.
Test Statistic
2.13
Test Distribution
Standard Normal (Z)
Test Direction
One-tailed (directional)
Scenario Comparison
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p-value
0.0165857
Z-statistic = 2.13 | α = 0.01
○ Not Statistically Significant
Since p = 0.016586 ≥ α = 0.01, the results are not statistically significant. You fail to reject the null hypothesis. Moderate evidence against the null hypothesis.
Decision Rule
If p < α
Reject H₀
Statistically significant
If p ≥ α
Fail to Reject H₀
Not statistically significant
Test Direction
One-tailed
Test Type
Z-test
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