Binomial Probabilities 1 Ecology Wolves The following is bas

Binomial Probabilities:

1. Ecology: Wolves The following is based on information taken from The Wolf in the Southwest: The Making of an Endangered Species, edited by David Brown (University of Arizona Press). Before 1981, approximately 55% of the wolves in New Mexico and Arizona region were male, and 45% female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present, approximately 70% of wolves in the region are male, and 30% female. Biologists suspect that male wolves are more likely than females to return to area where the population has been greatly reduced.

a) Before 1918, in a random sample of 12 wolves spotted in the region, what was the probability that 6 or more were male? What was the probability that fewer than 4 were females?

b) Answere part (a) for the period from 1918 to the present.

Please show work, thank you.

Solution