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.
Where Do Vultures Live. Vultures are birds from one of two groups; Old World Vultures and New World Vultures. Despite their name these two groups of vultures are not closely related. However, all species of vultures are scavenging birds and are best known for feeding on dead animal carcasses.