If a simple least squares regression model is developed based on a sample where the two variables ...

If a simple least squares regression model is developed based on a sample where the two variables are known to be positively correlated, the sign on the regression coefficient will be positive also.
 
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Q. 2

To deseasonalize a time series, assuming a multiplicative model, the observed values are divided by the appropriate seasonal index.
 
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Q. 3

Herb Criner, an analyst for the Folgerty Company, recently gave a report in which he stated that the annual sales forecast based on 20 years of annual sales data was done using a seasonally adjusted, trend-based forecasting technique.
 
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Q. 4

If a polynomial model has a larger R-square than a linear model for the same set of data, this is one indication that the polynomial model fits the data better than the linear model.
 
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Q. 5

When using the multiplicative time-series model to determine the seasonal indexes, the first step is to isolate the seasonal and random components from the cyclical and trend components.
 
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