Qi Wang, Department of Statistics
Oct 3, 2018
In a recent year, the Wall Street Journal, reported that 58% of all American credit card holders had to pay a late fee. A random sample of 15 American credit card holders is selected. Let X be the number of credit card holders in the sample who had to pay a late fee. Assume that all credit card holders are independent of one another.
A college student is running late for his class and does not have time to pack his backpack carefully. He has 12 folders on his desk, 4 include HW assignments due today. He grabs 3 of the folders randomly and when he gets to class, counts the number of them that contain HW.
Courtney is running downtown and passes a gas station at a rate of once per 2.5 minutes (this is an average of 0.4 gas stations a minute). Let G be the number of gas stations Courtney passes during her thirty minute run.