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    Confidence interval for the difference in mean scores

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    An investigator at a nearby university wants to find out from a recent "math skills" test if there is any difference in scores
    between full-time and part-time students. Records show the following:

    Student Mean Score Standard Deviation Number

    Full-Time 83 12 45
    Part-Time 70 15 55

    Compute a 95% confidence interval for the difference in mean scores

    Please see the attached file for full problem description.

    © BrainMass Inc. brainmass.com March 4, 2021, 5:51 pm ad1c9bdddf
    https://brainmass.com/statistics/confidence-interval/confidence-interval-for-the-difference-in-mean-scores-14494

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    Please see thae attached file for the answer.

    sx1-x2=standard error of the difference between two means=square root of (s1^2/n1 + s2^2/n2)= 2.7002
    =square root of (12 ...

    Solution Summary

    Computes a 95% confidence interval for the difference in mean scores of full-time and part-time students.

    $2.49

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