# FTEST

### Definition

Returns the result of an F-test. An F-test returns the two-tailed probability that the variances in array1 and array2 are not significantly different. Use this function to determine whether two samples have different variances. For example, given test scores from public and private schools, you can test whether these schools have different levels of test score diversity.

### Sample Usage

### Syntax

FTEST(array1,array2)

The FTEST function syntax has the following arguments:

Array1 Required. The first array or range of data.

Array2 Required. The second array or range of data.

### Remarks

The arguments must be either numbers or names, arrays, or references that contain numbers.

If an array or reference argument contains text, logical values, or empty cells, those values are ignored; however, cells with the value zero are included.

If the number of data points in array1 or array2 is less than 2, or if the variance of array1 or array2 is zero, FTEST returns the #DIV/0! error value.

The F-test value that is returned by the LINEST function differs from the F-test value that is returned by the FTEST function. LINEST returns the F statistic, whereas FTEST returns the probability.

### In order to use the FTEST formula, start with your edited Excellentable:

### Then type in the FTEST formula in the area you would like to display the outcome:

### By adding the values you would like to calculate the FTEST formula for, Excellentable will generate the outcome: