Say is the average increase in shoe size for upper-class people compared to middle-class people: then the Wald test can be used to test whether is 0 (in which case social class has no association with shoe size) or non-zero (shoe size varies between social classes).
There are many different species of vultures and each has a different type of habitat. Turkey vultures are the most prominent of the New World vultures and can be found in Southern Canada, the Continental United States, Mexico, Central America and South America. These vultures live in small caves, beneath bushes, in hollowed out logs, and sometimes in abandoned structures.
oxpeckers live in the savana of south africa. most oxpeckers also live on rhinos. the reason why is becauee so long as the oxpecker cleans the rhino, the rhino will give the oxpecker protection. oxpeckers live in the savana of south africa. most oxpeckers also live on rhinos. the reason why is becauee so long as the oxpecker cleans the rhino, the rhino will give the oxpecker protection.