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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