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    Students t test

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    Please help with the following problem. Provide calculations and explanations.

    The mean interview time for a standard questionnaire of 31.3 minutes was considered to be excessive so the schedule was revised, yielding a mean interview time for a sample of 40 subjects of 21.3 minutes, with a standard deviation of 1.5 minutes. Have the researchers significantly reduced the interview times?

    © BrainMass Inc. brainmass.com June 3, 2020, 9:29 pm ad1c9bdddf
    https://brainmass.com/statistics/hypothesis-testing/students-t-test-and-hypothesis-testing-184836

    Solution Preview

    Problem: schedule was revised, yielding a mean interview time for a sample of 40 subjects of 21.3 minutes, with a standard deviation of 1.5 minutes. Have the researchers significantly reduced the interview times?

    Solution:
    Please see the attachments for full workings.

    Need to show the work and the formulas used!
    The mean interview time for a standard questionnaire of 31.3 minutes was considered ...

    Solution Summary

    This post helps with a statistics problem. Step by step method for testing the hypothesis under 5 step approach is discussed here. Excel template for each problem is also included. This template can be used to obtain the answers of similar problems.

    $2.19

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