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Here you can quickly determine the critical value (s) for two-tailed tests, as well as for one-tailed tests. It works for most common distributions in statistical testing: the standard normal distribution N (0,1) (that is when you have a Z-score), t-Student, chi-square, and F-distribution.
In this post, I’ll show you how to find critical values, use them to determine statistical significance, and use them to construct confidence intervals. I also include a critical value calculator at the end of this article so you can apply what you learn.
Use this calculator for critical values to easily convert a significance level to its corresponding Z value, T score, F-score, or Chi-square value. Outputs the critical region as well. The tool supports one-tailed and two-tailed significance tests / probability values.
How to Use the Critical Values Calculator. The critical value calculator is an easy-to-use tool for determining critical value whether it is a one-tailed test or two-tailed test. Test type : in this fields enter the type of test from z-score, t-score, chi-square χ 2, F-score or correlation coefficient r. Tail type : In this fields enter the ...
Use this best critical value calculator to determine the critical value for the z, t, chi-square, f, and r distributions. Unless you know how to identify critical value.
Step 1: Subtract the confidence level from 100%. 100% - 95% = 5%. Step 2: Convert this value to decimals to get α α. Thus, α α = 5%. Step 3: If it is a one-tailed test then the alpha level will be the same value in step 2. However, if it is a two-tailed test, the alpha level will be divided by 2.
The F critical value calculator calculates the critical value for the F statistic, choose the F distribution and enter the numerator degrees of freedom (n numerator - 1) and the denominator degrees of freedom (n denominator - 1).
