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    T-Test for Dependent Samples

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    Big Time Software Co. has developed a new version of it XD-3 software. They want to determine if the new version of XD-3 is faster then the old version. In a matched sample test they obtained the following results.

    Tester Old Version New Version
    1 2.6 2.8
    2 4.0 5.3
    3 3.8 2.9
    4 1.8 1.1

    A. What is the Null and Alternate hypothesis statement for the matched test?
    B. What is the average difference (D) for the problem?

    C. What is the standard deviation for the matched test?

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    Solution Preview

    Null Hypothesis: The new version of XD-3 is not significantly faster ...

    Solution Summary

    This solution is comprised of detailed step-by-step calculations and analysis of the given problems related to Statistics and provides students with a clear perspective of the underlying concepts. The expert provides the solution in an Excel file.