# How to Calculate Specificity?

With any test or statistic relevant to a certain group, calculating specificity is always important. Specificity will help one comprehend how effective a test can be when predicting a certain chang...
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http://www.ehow.com/how_8309111_calculate-specificity.html

## How to Calculate Sensitivity, Specificity, Positive Predictive Value, and Negative Predictive Value?

For any given test administered to a given population, it is important to calculate the sensitivity[1], specificity[2], positive predictive value[3], and negative predictive value[4], in order to d...
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http://www.wikihow.com/Calculate-Sensitivity%2C-Specificity%2C-Positive-Predictive-Valu...

## How to Calculate E = MC2?

It may not be obvious, but a blazing campfire relies on the principles contained in Einstein's famous equation, E = mc^2. This equation demonstrates the relationship between mass and energy. These ...
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http://www.ehow.com/how_8208976_calculate-mc2.html

## How to Calculate a Pay-Down?

If you are unhappy with your current payment amount on a loan, then you can calculate a pay-down to get the amount to a more reasonable monthly fee. For example, assume you currently pay $350 a mon...
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http://www.ehow.com/how_8479965_calculate-paydown.html

## How to Calculate NPV?

Net present value, often abbreviated as NPV, is one of the most helpful and fundamental tools available for financial decision making. While it is used heavily in the world of corporate finance, it...
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http://www.wikihow.com/Calculate-NPV