Critical Value Calculator

Calculate critical values for various statistical distributions including Normal, t, Chi-square, and F distributions.

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How to use the Critical Value Calculator

Select the type of distribution (Normal, t, Chi-square, or F)
Enter the significance level (α)
For t, Chi-square, and F distributions, specify the degrees of freedom
Choose whether the test is one-tailed or two-tailed (for Normal and t distributions)
The calculator will display the critical value and its interpretation

Perform chi-square tests for independence and goodness of fit. Analyze categorical data relationships and compare observed vs expected frequencies.

Calculate probabilities and z-scores for normal distributions. Perfect for statistical analysis and probability calculations.

Calculate z-scores to standardize your data and determine how many standard deviations a value is from the mean.