A Researcher Wants to Estimate the Proportion of Manufacturing Companies

question 19

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:

Amino Acid

An organic molecule that serves as the building block of proteins, containing both an amino group and a carboxyl group.

α-Carbon

Refers to the first carbon atom that attaches to a functional group in an organic molecule, playing a crucial role in the structure and reactivity of molecules.

Biological pH

The measure of acidity or alkalinity within living organisms or biological systems, crucial for maintaining homeostasis and enzymatic activities.

Positively Charged

Having a net positive electric charge due to the loss of electrons or an excess of protons.