P Value Two Tailed Test Calculator

Performing a two-tailed test is crucial in statistical hypothesis testing, particularly when assessing the significance of a hypothesis. The P Value Two Tailed Test Calculator simplifies this process, allowing users to determine the critical region based on the p-value and significance level (α).


In a two-tailed test, the critical region consists of values in both tails of the distribution. The formula for calculating the critical region involves comparing the p-value to the significance level (α).

How to Use

  1. Enter the observed p-value in the “Enter P Value” field.
  2. Input the desired significance level (α) in the “Enter Significance Level (α)” field.
  3. Click the “Calculate” button to obtain the critical region result.


Suppose you have a p-value of 0.02 and a significance level of 0.05. Using the calculator, you can determine whether the result is statistically significant.


  1. Q: What is a two-tailed test? A: A two-tailed test is a statistical hypothesis test that assesses whether a sample statistic is significantly different from both ends of the distribution.
  2. Q: How is the critical region determined? A: The critical region is determined by comparing the p-value to the significance level. If the p-value is less than or equal to α/2, the result is considered statistically significant.


The P Value Two Tailed Test Calculator streamlines the process of conducting a two-tailed hypothesis test, providing a quick and reliable way to determine the critical region. Use this tool to enhance the efficiency of your statistical analysis and make informed decisions based on significance levels and p-values.

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