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    Independent sample t test

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    Test the hypothesis of no differences for average payback period (years) necessary to justify solar heating systems for residences.

    Savings and Loans Other Financiers
    X1 = 8.7 X2 = 7.7
    S2/1 = .5 S2/2 = .6
    n1 = 100 n2 = 64.

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    What test of differences is appropriate in each of the following situations and why?
    (a) Average campaign contributions of Democrats, Republicans, and Independents are to be compared.

    ANOVA: Here a comparison of ...

    Solution Summary

    The solution provides step-by-step method for the calculation of t test statistic. Formula for the calculation and Interpretations of the results are also included.