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Information about "Confidence Interval for proportion"

From a large number of actuarial exam scores, a random sample of 375 scores is selected, and it is found that 270 of these 375 are passing scores. Based on this sample, find a 99% confidence interval for the proportion of all scores that are passing. Then complete the table below.
Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places.

What is the lower limit of the 99% confidence interval?
What is the upper limit of the 99% confidence interval?

Solution Preview

From a large number of actuarial exam scores, a random sample of 375 scores is selected, and it is found that 270 of these 375 are passing scores. Based on this sample, find a 99% confidence interval for the proportion of all scores that are passing. Then complete the table below.

Carry your intermediate computations to at least three ...

Solution Summary

The solution calculates the lower limit and the upper limit of of the 99% confidence interval, given sample proportion and sample size

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