In this formula, Degrees of Freedom uses Total Number of Observations & Number of Groups. We can use 6 other way(s) to calculate the same, which is/are as follows -
Degrees of Freedom = Size of Sample X+Size of Sample Y-2
Degrees of Freedom = Sample Size-1
Degrees of Freedom = Sample Size-2
Degrees of Freedom = Number of Groups-1
Degrees of Freedom = (Number of Rows-1)*(Number of Columns-1)
Degrees of Freedom = Sample Size-1