The F distribution is a continuous probability distribution and is used within the analysis of variance (ANOVA) that uses the F-test in which the actual calculated value is compared to the F-test statistic for hypothesis testing.

Rarely is the probability density function calculated mathematically. Thankfully that work has been done and F-tables with the most common levels of significance and degrees of freedom exist for reference.

**BE CAREFUL** when using tables. Some tables are for one-tailed test and others cover two-tailed test.

For a one-tailed test, the null hypothesis is rejected when the test statistic is greater than the value given in the F-table value.

Search Six Sigma related job openings

Click for a Password

to access entire site

Templates & Calculators

**Six Sigma Modules**

The following are available

**Click Here**

*Green Belt Program (1,000+ Slides)*

*Basic Statistics*

*Cost of Quality*

*SPC*

*Process Mapping*

*Capability Studies*

*MSA*

*Cause & Effect Matrix*

*FMEA*

*Multivariate Analysis*

*Central Limit Theorem*

*Confidence Intervals*

*Hypothesis Testing*

*T Tests*

*1-Way ANOVA*

*Chi-Square*

*Correlation and Regression*

*Control Plan*

*Kaizen*

*MTBF and MTTR*

*Project Pitfalls*

*Error Proofing*

*Effective Meetings*

*OEE*

*Takt Time*

*Line Balancing*

*Practice Exam*

*... and more*