A college admissions officer sampled 120 entering freshmen and found that 42 of them scored more than 30 on the ACT. Construct a 95% confidence interval for the proportion of all freshmen at this college who scored more than 30 on the ACT.
A college admissions officer sampled 120 entering freshmen and found that 42 of them scored more than 30 on the ACT. Construct a 95% confidence interval for the proportion of all freshmen at this college who scored more than 30 on the ACT.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:For the interval calculated above, which of the statements below is the correct interpretation?
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There is a 95% chance the sample proportion of freshman scoring above 31 is in
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We are 95% confident the interval calculated above contains the true proportion
of freshman who score 31 or above in the ACT.
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We are 95% confident the ACT Scores of freshmen are all above 31.
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There is a 95% chance the proportion of all freshman ACT score a will be above 30.
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