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    Time series analysis and multiple regression conceptual ones

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    1.If a categorical independent variable contains 2 categories, then
    _________ dummy variable(s) will be needed to uniquely represent
    these categories.
    a. 1
    b. 2
    c. 3
    d. 4
    2. A dummy variable is used as an independent variable in a
    regression model when
    a. the variable involved is numerical.
    b. the variable involved is categorical.
    c. a curvilinear relationship is suspected.
    d. 2 independent variables interact.
    3. Which of the following is not used to find a "best" model?
    a. Adjusted r2
    b. Mallow's Cp
    c. Odds ratio
    d. All of the above
    4. The effect of an unpredictable, rare event will be contained in the
    ___________ component.
    a. trend
    b. cyclical
    c. irregular
    d. seasonal
    5. The annual multiplicative time-series model does not possess
    _______ component.
    a. a trend
    b. a cyclical
    c. an irregular
    d. a seasonal
    6. When a time series appears to be increasing at an increasing rate,
    such that percentage difference from observation to observation is
    constant, the appropriate model to fit is the
    a. linear trend.
    b. quadratic trend.
    c. exponential trend.
    d. None of the above.

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    Solution Preview

    1.If a categorical independent variable contains 2 categories, then
    _________ dummy variable(s) will be needed to uniquely represent
    these categories.
    a. 1
    The two categories are 0 for the dummy and 1 for dummy

    2. A ...

    Solution Summary

    Answers six quenstions on basic statistics.

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