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    What is the confidence interval for the proportion of exam scores are passing in the population?

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    From a large number of actuarial exam scores, a random sample of 275 scores is selected, and it is found that 195 of these 275 are passing scores. Based on this sample, find a 95% confidence interval for the proportion of all scores that are passing. Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places.

    What is the lower limit of the 95% confidence interval?
    What is the upper limit of the 95% confidence interval?

    Can you please include a spreadsheet where you input the number and retrieve the answers? Thanks.

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    Solution Summary

    This solution gives the step by step method for computing confidence interval for estimating population proportion. This solution includes an attached Word and Excel file.