Enter the number of true positives, true negatives, and total samples into the calculator to determine the accuracy of a test.
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Accuracy Formula
The following formula is used to calculate the accuracy of a test.
A = ( TP + TN ) / S
- Where A is the accuracy
- TP is the true positives
- TN is the true negatives
- S is the total number of samples
To calculate the accuracy of a test, sum the true positives and true negatives, then divide by the total number of samples.
Accuracy Definition
Accuracy is defined as the measure of how many tests it takes to achieve a correct result.
Accuracy Example
How to calculate accuracy?
- First, determine the number of true positives.
Add up the total number of true positives produced by the test.
- Next, determine the number of true negatives.
Add up the total number of true negatives produced.
- Finally, calculate the accuracy.
Calculate the accuracy by summing the true negatives and positives and then dividing by the total number of samples (total number of tests performed)
FAQ
Accuracy is a measure of a test’s ability to achieve the correct result. For example, if a certain test should yield a value of 10, but the actual results in a value of 9, the accuracy is 9/10 = .90 = 90%.
Accuracy is most often used in the medical field when analyzing how correct a specific test is.
