🧪 P-Value Calculator

Two-tailed p-value for z = 2.1

0.035729

Significant at the 0.05 level, not at 0.01

Significant at α = 0.05?

Yes

Significant at α = 0.01?

No

Distribution

N(0, 1)

Step by step

1. Distribution under the null hypothesis: N(0, 1)
2. Left tail: P(Z < 2.1) = 0.982136
3. Right tail: P(Z > 2.1) = 0.017864
4. Two-tailed test: p = 2 × P(Z > |2.1|) = 2 × 0.017864 = 0.035729
5. Compare with α: p < 0.05 but p ≥ 0.01