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.
Definition: Barometric pressure. Barometric pressure is the pressure that air exerts upon the environment. This pressure is caused by the weight of all the air above the ground pressing down - gravity pulls air toward the earth just as it pulls everything else.