How to Calculate Denominator Degrees of Freedom

Some mathematical calculations of fractions require finding common denominators.
••• Comstock Images/Comstock/Getty Images

In statistical analysis, the F distribution assessment is used to analysis variance in a sample group. The denominator degrees of freedom is the bottom portion of the F distribution ratio and is often called the degrees of freedom error. You can calculate the denominator degrees of freedom by subtracting the number of sample groups from the total number of samples tested.

    Determine the total number of all samples tested. Add the number of samples tested in each group. For example, assume you tested 10 Dell computers, 20 Hewlett-Packard computers, 30 Apple computers and 40 Gateway computers. You would have the following equation: 10 + 20 + 30 + 40 = 100.

    Calculate the total number of sample groups. Continuing the same example, there are four sample groups: Dell Computers, Hewlett-Packard computers, Apple computers and Gateway computers.

    Calculate the denominator degrees of freedom. Subtract the number of sample groups from Step 2 from the total number of samples tested from Step 1. From the example, the equation is 100 - 4 = 96. The solution to this equation is the answer.

Related Articles

How to Calculate the Average Variance Extracted
How to Calculate Unexplained Variance
How to Compute a Population Mean
How to Convert a Fraction to a Ratio
How to Approximate the Mean of Group Data
How to Divide Rational Numbers
How to Calculate the Percent Weight Per Volume
Density of Carbonated Water
How to Convert From Moles Per Liter to Percentage
How to Subtract Percentages
How to Calculate a Semivariogram
How to Calculate Percent Solids by Weight
How to Calculate a P-Value
How to Calculate CV Values
How to Make a Relative Frequency Table
How to Calculate a Fraction to a Decimal
How to Find the X Intercept of a Function
What Are Representative Particles of Elements?
What Is Molarity & How Is It Calculated?