# How to Calculate R-Value?

R-value is an experimentally determined measurement that gives an indication as to the heat loss that can be anticipated through a material. R-value is traditionally represented in either SI, Inter...
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http://www.ehow.com/how_8138104_calculate-rvalue.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 Ad Value?

Advertising Value Equivalency, or AVE, provides the estimated cost of placing an advertisement in a given editorial space in print or television. Calculating the total cost for all your media cover...
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http://www.ehow.com/how_6803803_calculate-ad-value.html

## How to Calculate P Value?

P-value, or probability value, is a statistical measure that helps scientists determine if their hypotheses are correct. It is directly related to the significance level, which is an important comp...
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http://www.wikihow.com/Calculate-P-Value

## How to Calculate RMS Value?

Technically, the root mean square (RMS) of a variable is the square root of the average of the square of the variable. This kind of average is useful when a simpler type of averaging yields little ...
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http://www.ehow.com/how_6369289_calculate-rms-value.html