F-Distribution Explorer

Explore the F-distribution for variance ratios. The F-test compares F = s12 / s22 with df1 = n1 - 1 and df2 = n2 - 1. In common practice, the F-test is almost always a one-tailed (specifically, right-tailed) test.

By Chenguang Pan.

F-Distribution & Tail Area

Default: Right Tail
p-value: 0.1042 Critical F: 2.96

Variance Ratio Lens

Variance ratio F = 1.60 (df1 = 8, df2 = 10)
Use this ratio as your F statistic in the calculator.

P-value Calculator

p-value: 0.1042

Critical F-Value Calculator

Critical F: 2.96

F-Table (Critical Values)