
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:9) A college admissions officer sampled 107 entering freshmen and found that 38 of them
scored more than 510 on the math SAT. Round your final answers to 3 digits after the
decimal point.
(a) Find a point estimate for the proportion of all entering freshmen at this college who
scored more than 510 on the math SAT.
6)
cons
(b) Construct a 95% confidence interval for the proportion of all entering freshmen at this
college who scored more than 510 on the math SAT.
(c) According to the College Board, 40% of all students who took the math SAT in 2009
scored more than 510. The admissions officer believes that the proportion at her university is
also 40%. Does the confidence interval contradict this belief? Explain.
13
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