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.
Vulture Trivia. 1  There are 23 vulture species in the world, and at least one type of vulture is found on every continent except Australia and Antarctica. 2  Vulture species are divided into New World (the Americas and Caribbean) and Old World (Europe, Asia and Africa) groups depending on their ranges.