Glossary P
The Environmental Glossary. Letter P +++ Popular Articles: 'Process', 'Potential', 'Periplaneta americana'
A Pentanes plus is a mixture of hydrocarbons, mostly pentanes and heavier fractions, extracted from natural gas.
Per capita ecological footprint is amount of biologically productive land and water needed to supply each person or population with the renewable resources they use and to absorb or dispose of the wastes from such resource use.
Per capita GDP is the Annual Gross domestic product (GDP) of a country divided by its total population at midyear. It gives the average slice of the economic pie per person. Used to
A per capita use is the average amount of water used per person during a standard time period, generally per day.
A Percentile is any one of the points dividing a distribution of values into parts each of which contain 1/100 of the values. For example, the 75th percentile is a value
A Percolation is the movement of groundwater from the unsaturated zone to the saturated zone
Performance Criteria are Measures of data quality that are used to judge the adequacy of collected information that is new or original, otherwise known as "primary data.”
The Performance Curve is the probability of deciding that the parameter of interest is greater than action level over the range of possible population parameters and which is used to assess the goodness of a test or to compare two competing tests; similar in concept to a statistical power curve