A Manufacturer Receives Parts from Two Suppliers

question 42

Multiple Choice

A manufacturer receives parts from two suppliers.A simple random sample of 400 parts from Supplier 1 finds 20 defective.A simple random sample of 200 parts from Supplier 2 finds 20 defective.Let p₁ and p₂ be the proportion of all parts from Supplier 1 and Supplier 2,respectively,that are defective.What is the estimate for the difference in proportions,p₁ - p₂?

• A)-0.05
• B)0.05
• C)0.067
• D)0.10

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Definitions:

Glorieta Pass

A site in New Mexico where a significant Civil War battle took place in 1862, pivotal in halting the Confederate westward expansion.

Confederacy

The confederation of 11 southern states that seceded from the United States in 1860-1861, leading to the American Civil War.

Major Robert Anderson

A Union Army officer during the American Civil War, best known for his defense of Fort Sumter at the outbreak of the war.

Fort Sumter

A sea fort in Charleston, South Carolina, known for two battles of the American Civil War, the first of which marked the war's beginning.