There is a close relationship between confidence intervals and significance tests. Specifically, if a statistic is significantly different from 0 at the 0.05 level, then the 95% confidence interval will not contain 0.
U.S. National Library of Medicine(0.00 / 0 votes)Rate this definition: Air Pressure. The force per unit area that the air exerts on any surface in contact with it. Primarily used for articles pertaining to air pressure within a closed environment.
Knowing what a barometer is or how to use it is pointless if you don't understand air pressure. Air pressure, or barometric pressure, is the measurement of how much air is above any one area at a given time. The more air, the more pressure that it exerts down on the space below.he air pressure at sea level is 14.7 pounds per square inch, or 1,013 hectopascals. The phrase a rising barometer means that air pressure is increasing, while a falling barometer indicates a drop in pressure. As the air pressure changes, the amount of oxygen present does too.