Sampling Eye Color Based on a study by Dr. P. Sorita Soni, eye colors in the United States are as follows: 40% brown, 35% blue, 12% green, 7% gray, 6% hazel.

a. A statistics instructor collects eye color data from her students. What is the name for this type of sample?

b. Identify one factor that might make the sample from part

(a) biased and not representative of the general population of people in the United States.

c. What is the probability that a randomly selected person will have brown or blue eyes?

d. If two people are randomly selected, what is the probability that at least one of them has brown eyes?