LR−
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The LR− Calculator is a useful tool for statisticians and researchers who need to calculate the negative likelihood ratio. This measure is fundamental in many statistical analyses, especially in hypothesis testing and data modeling.
The formula to calculate the negative likelihood ratio is simple: LR− = (1 - Sensitivity) / Specificity. The sensitivity and specificity are values that need to be known to calculate the LR−.
The negative likelihood ratio is important because it helps to understand the relationship between the presence or absence of a trait or characteristic in a group of data and the probability of occurrence of that characteristic in another group.
Note that the negative likelihood ratio is not a direct measure of probability, but rather a relative measure that helps to evaluate the strength of the evidence in favor of or against a hypothesis.
Frequently asked questions
What is the negative likelihood ratio?
The negative likelihood ratio is a measure that helps to understand the relationship between the presence or absence of a trait or characteristic in a group of data and the probability of occurrence of that characteristic in another group.
When to use the LR− calculator?
Use the LR− calculator when you need to calculate the negative likelihood ratio in a statistical analysis, especially in hypothesis testing and data modeling.
What is sensitivity and specificity?
Sensitivity is the ability to detect true cases, while specificity is the ability to not detect false cases. Both measures are fundamental to calculate the negative likelihood ratio.
Why is the negative likelihood ratio important?
The negative likelihood ratio is important because it helps to evaluate the strength of the evidence in favor of or against a hypothesis.
How can I use the LR− calculator?
Just insert the values of sensitivity and specificity into the calculator and it will do the calculation of the negative likelihood ratio for you.