Random Assignment and Confounding Worksheet with Answer Key

What's on the worksheet

1. A city will test a new dimming controller on 5 of its 150 street lamps (made-up numbers); the other 145 lamps keep their old controllers, and the…
2. A campus coffee company runs 18 carts, numbered 1 to 18 (made-up numbers).
3. An office park has 20 vending machines (made-up numbers), and 10 of them will get a new snack layout.
4. A made-up call center has 40 agents, and 20 of them will use a new greeting script for a month.
5. A made-up florist chain has 8 shops and wants to test a new bouquet wrap.
6. A made-up podcast app will test two layouts of its home screen.
7. A made-up company owns 5 mini-golf courses, numbered 1 to 5.