# Statistics Symbols - F

### Symbol: f

Meaning:
f is used to represent frequency or the number of occurrences.
Formula used:
f= Number of time score or the number of time it is repeated.

### Symbol: F

Meaning:
It is used to represent F distribution variable.
Formula used:
F=(X21 /n1)/ (X22 /n2), where n1and n2 are the degrees of freedom of chisquare distribution.
Used in:
Hypothesis testing for testing equality of two variances and also in ANOVA test.

### Symbol: F(X) or Fx

Meaning:
It is the distribution function.
Formula used:
Fx=∫ -∝x f(X) dX
Used in:
Hypothesis testing for testing equality of two variances and also in ANOVA test.

### Symbol: f(x) or fx

Meaning:
It is the probability mass function in case of discrete distribution or probability density function in case of continuous distribution.
Formula used:
It depends on the distribution.
fx ≥ 0 and ∑x f(x) =1, where X follows a discrete distribution.
And ∫x f(x) dx=1, where X follows a continuous distribution.
Used in:
Hypothesis testing for testing equality of two variances and also in ANOVA test.

TutorTeddy.com & Boston Predictive Analytics

[ Email your Statistics or Math problems to tutor@aafter.com (camera phone photos are OK) ]

Boston Office (Near MIT/Kendall 'T'):
Cambridge Innovation Center,