A Simple Random Sample of 100 of a Certain Popular

question 100

Multiple Choice

A simple random sample of 100 of a certain popular model car in 2003 found that 20 had a certain minor defect in the brakes.A simple random sample of 400 of this model car in 2004 found that 50 had the minor defect in the brakes.Let p₁ and p₂ be the proportion of all cars of this model in 2003 and 2004,respectively,that actually have the defect.What is a 90% confidence interval for p₁ - p₂?

• A)0.075 ± 0.071
• B)0.075 ± 0.085
• C)0.075 ± 0.112
• D)0.079 ± 0.071

---

Definitions:

Over-The-Counter

A decentralized market where securities that are not listed on formal exchanges are traded, usually through a network of dealers.

Cash Receipts

The collection of money, typically in the form of cash or checks, received by a business.

Electronic Cash Registers

Machines or systems used at retail checkout points to calculate and record sales transactions, accept payments, and store cash.

Designated Personnel

Individuals who are specifically chosen or assigned to carry out particular tasks or responsibilities.