Which of the following are examples of inferential statistics?

check all that apply.

a. finding the average (mean) of a set of numbers
b. testing every lightbulb produced by a company to confirm that each one works
c. testing random samples of lightbulbs produced by a company to confirm they work
d. predicting whom you will someday marry
e. testing a new drug on a random sample of patients to see how effective it is at curing the flu