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Practice Quiz
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1

Which is not a component of a time series?
A)Weather variation
B)Cyclical variation
C)Seasonal variation
D)Irregular variation
2

Episodic and residual are subdivisions of
A)Irregular variation
B)Cyclical variation
C)Seasonal variation
D)Secular trends
3

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Above are the sales of a hardware store in millions of dollars. What is the slope of the least squares regression line?
A)1.6
B)7
C)4.4
D)11
4

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Above are the sales of a hardware store in millions of dollars. What is the intercept of the least squares regression line?
A)7
B)1.6
C)4.4
D)11
5

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Above are the sales of a hardware store in millions of dollars. What is the forecasted sales figure for 2007?
A)15
B)16.6
C)18.2
D)20
6

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Above are the sales of a department store in millions of dollars. What is the 3-year moving average for 2004?
A)17
B)16.667
C)17.667
D)16.25
7

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Above are the sales of a department store in millions of dollars. What is the centred 4-year moving average for 2004?
A)17
B)17.75
C)17.375
D)17.667
8

The ratio-to-moving-average method is used to compute
A)Long-term trends
B)Seasonal patterns
C)Irregular fluctuations
D)The least-squares equation





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