Students of Two Sections of a History Course Took a Common

question 39

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 = 400 and = 200, respectively. Suppose you obtain a 95% confidence for the ratio of the population variances. Which of the below allows you to conclude the first variance is smaller than the second variance?

• A) The entire interval is less than 1
• B) The interval captures 1
• C) The entire interval is more than 1
• D) None of the above