In the hypothesis testing approach of Jerzy Neyman and Egon Pearson, a null hypothesis is contrasted with an alternative hypothesis, and the two hypotheses are distinguished on the basis of data, with certain error rates. Proponents of each approach criticize the other approach.
In geography, relief refers to the highest and lowest elevation points in an area. Mountains and ridges are typically the highest elevation points, while valleys and other low-lying areas are the lowest. Relief is essential to understanding the topography of an area.
Breathing. If breathing is difficult with or without oxygen being given, sometimes a fan blown over the body to give the sensation of being in fresh air, combined with the mental suggestion of visualising sitting on a beach in the wind or the top of a high hill can give relief.