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.
protective shelter: The lee of the rock gave us some protection against the storm. 2. the side or part that is sheltered or turned away from the wind: We erected our huts under the lee of the mountain. 3. Chiefly Nautical. the quarter or region toward which the wind blows. adjective.