An F in statistics is typically a grade. This F means that you are failing or have failed the course.
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degrees of freedom
The two main branches of statistics is Descriptive statistics and inferential statistics.
An F-statistic is a measure that is calculated from a sample. It is a ratio of two lots of sums of squares of Normal variates. The sampling distribution of this ratio follows the F distribution. The F-statistic is used to test whether the variances of two samples, or a sample and population, are the same. It is also used in the analysis of variance (ANOVA) to determine what proportion of the variance can be "explained" by regression.
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