Sample Statistics. 1  x refers to a sample mean. 2  s refers to the standard deviation of a sample. 3  s2 refers to the variance of a sample. 4  p refers to the proportion of sample elements that have a particular attribute. 5  q refers to the proportion of sample elements that do not have a particular attribute, so q = 1 - p.
Ecology/Environmental Response. The most basic interest of ecologists is how organisms interact with their environment. Inanimate objects do not normally interactâthey are simply acted upon by forces in the environment. Organisms, however, cannot be totally passive within a chain of events and still sustain life.
_ Human/Environment Interaction _ Human/environment interaction is how people adapt to, depend on, and modify their environment. For example, in tropical areas people adapt to the weather by wearing shorts and t-shirts instead of winter coats, depend on the wildlife and plants for food, and modify the land to grow crops and create farmland.