Explore BrainMass

Explore BrainMass

    Confidence Intervals

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    From a large number of actuarial exam scores, a random sample of scores is selected, and it is found that of these are passing scores. Based on this sample, find a 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.
    1. What is the lower limit of the 95% confidence interval?

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

    © BrainMass Inc. brainmass.com June 3, 2020, 5:06 pm ad1c9bdddf
    https://brainmass.com/statistics/confidence-interval/confidence-intervals-14213

    Attachments

    Solution Preview

    Applying the general formula for a confidence interval, the confidence interval for a proportion is:
    <br>p +- z * SE
    <br>where p is the proportion in the ...

    Solution Summary

    From a large number of actuarial exam scores, a random sample of scores is selected, and it is found that of these are passing scores. Based on this sample, find a 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.
    1. What is the lower limit of the 95% confidence interval?

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

    $2.19

    ADVERTISEMENT