THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 87

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
A dependent random sample from two normally distributed populations gives the following results:
n = 20,
= 26.5,s₂ = 3.2
-A 95% confidence interval estimate for the difference between two population means,μ₁ - μ₂,is determined to be 62.75 < μ₁ - μ₂ < 68.52.Which of the following is true if the confidence level is reduced to 90%?

• A)The confidence interval becomes wider.
• B)The confidence interval remains the same.
• C)The confidence interval becomes narrower.
• D)More information is required to determine the answer.

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Definitions:

Marginal Cost

The extra outlay required to produce one more unit of a product or service.

R&D Expenditures

Financial resources dedicated to research and development efforts aimed at developing new products or enhancing current offerings.

Expected Rate of Return

The anticipated amount of profit or loss an investment is likely to generate relative to its cost.