Wall tent Wall tent A wall tent, also known as an outfitter tent, safari tent, or sheep herder tent is a type of tent that has four straight vertical walls that provide more headroom than traditional pyramid-shaped tents. Wall tents are typically made of a heavy canvas and are used by hunters because they can accommodate several people and their supplies. Wall tents are suitable as a four-season tent, as they are able to accommodate a wood stove. Wall tents are commonly used in Civil War reenactments, and, in recent years, have also become used for glamping. Frames may be either internal
Portmanteau test with ARIMA models. In the context of regression analysis, including regression analysis with time series structures, a portmanteau test has been devised, which allows a general test to be made for the possibility that a range of types nonlinear transformations of combinations of the explanatory variables should have been included in addition to a selected model structure. Portmanteau test A portmanteau test is a type of statistical hypothesis test in which the null hypothesis is well specified, but the alternative hypothesis is more loosely specified. Tests constructed in this context can have the property of being at least moderately powerful