Question
A college admissions officer sampled 120 entering freshmen and found that 42 of them scored more than 550 on the math SAT. a. Find a
A college admissions officer sampled 120 entering freshmen and found that 42 of them scored more than 550 on the math SAT.
a. Find a point estimate for the proportion of all entering freshmen at this college who scored more than 550 on the math SAT.
b. Construct a 98% confidence interval for the proportion of all entering freshmen at this college who scored more than 550 on the math SAT.
c. According to the College Board, 39% of all students who took the math SAT in 2009 scored more than 550. The admissions officer believes that the proportion at her university is also 39%. Does the confidence interval contradict this belief? Explain.
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An Introduction to the Mathematics of Financial Derivatives
Authors: Ali Hirsa, Salih N. Neftci
3rd edition
012384682X, 978-0123846822
