Question 15 4 4 points an independent variable x j is

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Question 15 4 / 4 points An independent variable X j is considered highly correlated with the other independent variables if VIF > 5 VIF < 5 R-squared > 0 R-squared > .5
Question 16 4 / 4 points True or False: The Variance Inflationary Factor (VIF) measures the correlation of one X variables with the other X variables.
Question 17 4 / 4 points The Variance Inflationary Factor (VIF) measures the
Question 18 4 / 4 points 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
Question 19 4 / 4 points TABLE 16-8 The president of a chain of department stores believes that her stores' total sales have been showing a linear trend since 1980. She uses Microsoft Excel to obtain the partial output below. The dependent variable is sales (in millions of dollars), while the independent variable is coded years, where 1980 is coded as 0, 1981 is coded as 1, etc. Summary Output Regression Statistics Multiple R 0.604 R Square 0.365 Adjusted R Square 0.316 Standard Error 4.800 Observations 17 Coefficients Intercept 31.2 Coded Year 0.78 Referring to Table 16-8, the fitted trend value (in millions of dollars) for 1985 is __________. .365 31.2 35.1 35.88
Question 20 4 / 4 points True or False: Given a data set with 15 yearly observations, there are only thirteen 3-year moving averages.
Question 21 4 / 4 points The fairly regular fluctuations that occur within each year would be contained in the _________________ component.
Question 22 4 / 4 points TABLE 16-2 The monthly advertising expenditures of a department store chain (in $1,000,000s) were collected over the last decade. The last 14 months of this time series follows: Month Expenditures ($) 1 1.4 2 1.8 3 1.6 4 1.5 5 1.8 6 1.7 7 1.9 8 2.2 9 1.9 10 1.9 11 2.1 12 2.4 13 2.8 14 3.1 Referring to Table 16-2, set up a scatter diagram (i.e., time-series plot) with months on the horizontal X-axis. True or False: Referring to Table 16-2, advertising expenditures appear to be increasing in a linear rather than curvilinear manner over time.
Question 23 4 / 4 points The following table contains the number of complaints received in a department store for the first 6 months of last year. Month Complaints Jan 36 Feb 45 Mar 81 Apr 108 May 144 Referring to the above table, if a three-term moving average is used to smooth this series, what would be the first calculated term? 36 40.5 54 78
Question 24 4 / 4 points When using the exponentially weighted moving average for purposes of forecasting rather than smoothing,
Question 25 4 / 4 points The overall upward or downward pattern of the data in an annual time series will be contained in the ____________ component.
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