Refer to Exercise 4.103. Suppose that the number of vehicles using the acceleration lane per minute has a mean equal to 1.1.

a. What is the probability that more than two vehicles will use the acceleration lane in the next minute? 

b. What is the probability that exactly three vehicles will use the acceleration lane in the next minute?

Data from Exercise 4.103

Refer to the Applied Ecology and Environmental Research (Vol. 1, 2003) study of beech trees damaged by fungi. The researchers found that 25% of the beech trees in East Central Europe have been damaged by fungi. Consider a sample of 20 beech trees from this area.