Explore BrainMass

Explore BrainMass

    Confidence Interval

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

    Using the following information, construct a 90% confidence interval for (:1 - :2).
    Sample 1: n = 8 mean = 151 standard deviation = 31
    Sample 2: n=21 mean = 130 standard deviation = 72

    please show results of all steps in the process.

    © BrainMass Inc. brainmass.com March 4, 2021, 5:37 pm ad1c9bdddf
    https://brainmass.com/statistics/confidence-interval/confidence-interval-standard-deviation-3128

    Solution Preview

    Attached is the step by step response. Enjoy.

    Description Confidence Interval
    Posting Using the following information, construct a 90% confidence interval for (:1 - :2).
    Sample 1: n = 8 mean = 151 standard deviation = 31
    Sample 2: n=21 mean = 130 standard deviation = 72

    please show results of all steps in the process.

    Sample 1 (for 90% confidence interval):

    1. Calculate the estimated standard error of the mean ...

    Solution Summary

    The solution constructs a 90% confidence interval for (:1 - :2).

    Sample 1: n = 8 mean = 151 standard deviation = 31
    Sample 2: n=21 mean = 130 standard deviation = 72

    $2.49

    ADVERTISEMENT