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In a 2018 poll conducted by SurveyMonkey, they randomly surveyed 368 students from two- and four-year institutions...

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Statistics

In a 2018 poll conducted by SurveyMonkey, they randomly surveyed368 students

from two- and four-year institutions across the U.S. Accordingto the survey, 58% purchased at

least one of their textbooks on Amazon. What proportion of allU.S. college students purchased

at least one of their textbooks on Amazon?

a. Use StatCrunch to find a 95% confidence interval:_________________

b. Interpret your confidence interval in words.

c. True or False: A 90% confidence interval would be wider thana 95% confidence interval.

d. If the true proportion of all U.S. college students whopurchased at least one of their

textbooks on Amazon was 62%, does our confidence intervalsupport or refute it?

Answer & Explanation Solved by verified expert
4.5 Ratings (894 Votes)
using exceladdinphstatconfidence interval we ahve Confidence Interval Estimate for the Proportion Data Sample Size 368 Number of Successes 213 Confidence Level 95    See Answer
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