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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?
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.
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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