A Researcher Wants to Estimate the Proportion of Manufacturing Companies

question 86

Multiple Choice

A researcher wants to estimate the proportion of manufacturing companies that use the six sigma method.For this purpose,she takes a random sample of 50 manufacturing companies and finds out that 28 of them employ this method.The 95% confidence interval for the proportion of manufacturing companies that use six sigma is ______.

• A) 0.462 to 0.628
• B) 0.452 to 0.638
• C) 0.442 to 0.648
• D) 0.432 to 0.658
• E) 0.422 to 0.668

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Definitions:

Operating Cycle

The average time that it takes to purchase inventory, sell it on account, and then collect cash from customers.

Short-Term Debt Investments

Investments made with the intention of earning a return on surplus cash that can be converted into cash within a short period, usually less than one year.

Securities Market

A financial marketplace where securities such as stocks and bonds are bought and sold, facilitating capital flow in the economy.

Brokerage Fees

Fees charged by a broker for executing transactions or providing specialized services.