How to Calculate Valid Percent

••• Comstock/Comstock/Getty Images

The valid percent is simply the proportion of a sample that is valid. Data can be invalid for a variety of reasons. Some data are simply impossible, such as negative heights or weights. Some data can be shown to be invalid by comparing them with other data. For example, a person might be two years old, and a person might be a widow. But it is hard to conceive of a person who is a two year old widow! Finally, some data can be identified as machine error or data entry error.

    Write down the total sample size. For example, you might have 1000 cases.

    Write down the number that are invalid. For example, there might be 92 invalid cases for one reason or another.

    Subtract the result in step 2 from that in step 1. For instance 1000 - 92 = 908.

    Divide the result in step 3 by the result in step 1 and multiply by 100. 908/1000 = .908. .908*100 = 90.8. Therefore 90.8 percent of our data are valid.

Related Articles

How to Calculate Standard Errors
How to Calculate Correlation Coefficients With an Equation
How to Calculate CV Values
The Difference Between Bivariate & Multivariate Analyses
How to Calculate Outliers
The Difference Between a T-Test & a Chi Square
How to Calculate a P-Value
How to Calculate the Percentage of Another Number
How to Calculate Logit
How to Calculate Odds Ratio on a Contingency Table
How to Calculate Variance From Standard Error
The Advantages of a Large Sample Size
How Do I Calculate the Relative Standard Deviation...
How to Calculate the Geometric Mean
How to Make a True Equation
What Are Gaps, Clusters & Outliers in Math?
Test Your Knowledge on Middle School Science
How to Find the Mole Fraction
How to Approximate the Mean of Group Data
Explain the Mean, Mode & Median

Dont Go!

We Have More Great Sciencing Articles!