F Statistic Calculator – Easy & Accurate Analysis

This tool calculates the F statistic to help you understand variances between group means in your datasets.

How to Use This F Statistic Calculator

This calculator helps you compute the F-statistic given two variances and their respective degrees of freedom.

Steps to Use:

  • Enter the first variance in the “Variance 1” field.
  • Enter the degrees of freedom for the first variance in the “Degrees of Freedom 1” field.
  • Enter the second variance in the “Variance 2” field.
  • Enter the degrees of freedom for the second variance in the “Degrees of Freedom 2” field.
  • Click the “Calculate” button to compute the F-statistic.
  • The result will be displayed in the “Result” field.

How It Calculates the Result:

The F-statistic is computed using the formula:

F = (Variance1 / Degrees_of_Freedom1) / (Variance2 / Degrees_of_Freedom2)


  • Ensure that all inputs are positive numerical values.
  • The degrees of freedom should be integers.
  • This calculator only accepts numerical inputs and does not handle complex data types.

Use Cases for This Calculator

Calculating F Statistic for One-Way ANOVA

Enter the sample size and the mean squares for the groups and error to get the F statistic value. This use case helps you determine if there are significant differences between group means in your study.

Comparing F Statistic to Critical Value

Input the degrees of freedom for groups and error to compare the calculated F statistic with the critical value at a chosen significance level. This step assists you in determining the statistical significance of your results.

Interpreting F Statistic for Factorial ANOVA

When conducting a factorial ANOVA, enter the effect size estimates and degrees of freedom to compute the F statistic, aiding you in understanding the relationships among multiple factors in your analysis.

Evaluating Effect Size Using F Statistic

After obtaining the F statistic value, input the degrees of freedom to compute the effect size (eta-squared or omega-squared), providing insights into the magnitude of the differences observed between groups or factors.

Checking Assumptions with F Statistic

To verify the assumption of homogeneity of variances, use the F statistic to compare variance estimates across groups or conditions, ensuring the validity of the analysis results.

Performing Post Hoc Tests with F Statistic

Upon calculating the F statistic and obtaining significant results, conduct post hoc tests to identify specific group differences by comparing all possible pairs using appropriate statistical tests like Tukey HSD or Bonferroni correction.

Applying F Statistic in Regression Analysis

In regression models, input the model sum of squares and residual sum of squares to calculate the F statistic, assisting you in examining the overall significance of the regression equation and the predictors used.

Utilizing F Statistic in MANOVA

For Multivariate Analysis of Variance (MANOVA), enter the Wilks’ Lambda or Pillai’s Trace values to compute the F statistic, helping you assess the significance of the overall effect of categorical variables on multiple dependent variables simultaneously.

Understanding ANCOVA with F Statistic

In Analysis of Covariance (ANCOVA), input the adjusted and unadjusted mean squares for regression and error to calculate the F statistic, aiding you in determining the impact of covariates on the relationship between the independent and dependent variables.

Exploring Repeated Measures ANOVA Using F Statistic

When analyzing repeated measures data, enter the within-subject mean squares and error mean squares to calculate the F statistic and evaluate the differences between treatments over time, providing insights into how factors influence the dependent variable’s outcome.

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