In an Analysis of Hunting by African Lions, Biologists Filmed

Essay

In an analysis of hunting by African lions, biologists filmed prey captures from thesafety of their vehicles. Prey captures were then divided into a sequence of events.One of the events is the stalk, defined as the reduction of predator-prey distance forprey that has been specifically targeted. The investigators identified two types ofstalk: (a) "crouching," -- the lion is concealed and either the lion advances toward theprey or the prey advances (unaware) toward the lion, and (b)"running," -- the lion isless concealed and advances toward the prey in a rapid manner.

Data on lions' stalks of wildebeests and zebras from a simple random sample of 159kills are summarized in the table below. Researchers believe that the proportion of stalks that are the crouching type is about 0.87. Do the data above provide evidence that the researchers' belief is incorrect andthat the proportion of crouching stalks of wildebeests and zebras is different from 0.87?