The Kingston Review (KR) is testing a new GMAT question. The KR wants to determine what proportion of test-takers will answer the question correctly, in order to assess its difficulty. In a random sample of 144 test-takers, 75% answered the question correctly.
What is the 95% confidence interval for the proportion of test-takers answering the question correctly?
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[65.7%, 84.3%]
[67.9%, 82.1%]
[69.1%, 80.9%]
The answer cannot be determined from the information provided.
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The kingston review (kr) is testing a new gmat question. the kr wants to determine what proportion of test-takers will answer the question correctly, in order to assess its difficulty. in a random sample of 144 test-takers, 75% answered the question correctly. what is the 95% confidence interval for the proportion of test-takers answering the question correctly?
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