Which of the following are examples of inferential statistics?

check all that apply.

a. testing 1 in 10 of a company's products to determine that they are free of defects
b. testing random samples of wild animals to decide whether they are healthy
c. giving a drug test to all the athletes in the tour de france and reporting which athletes are clean
d. finding the average (mean) of a set of numbers
e. predicting whom you will someday marry