Students of Two Sections of a History Course Took a Common

question 47

Multiple Choice

Students of two sections of a History course took a common final examination.The course instructor examines the variance in scores between the two sections.He selects random samples of n₁ = 11 and n₂ = 16 with sample variances of and ,respectively.Assuming that the population distributions are normal,construct a 90% confidence interval for the ratio of the population variance.

• A)[0.90,2.41]
• B)[0.50,2.00]
• C)[0.25,4.00]
• D)[0.79,5.70]

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