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321) Referring to Table 14-18, what are the degrees of freedom for the chi-square distribution when testing whether the model is a good-fitting model?   322) Referring to Table 14-18, what is the p-value of the test statistic when testing whether the model is a good-fitting model?   323) Referring to Table 14-18, the.
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    131) Referring to Table 16-13, what is the exponentially smoothed value for the 12th month using a smoothing coefficient of W = 0.5 if the exponentially smooth value for the 10th and 11th month are 9,746.3672 and 9,480.1836, respectively?   132) Referring to Table 16-13, what is the exponentially smoothed forecast for.
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    21) The method of least squares is used on time-series data for A) eliminating irregular movements. B) deseasonalizing the data. C) obtaining the trend equation. D) exponentially smoothing a series.   22) A least squares linear trend line is just a simple regression line with the years recoded.   23) The method of least squares may be used.
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    21) Referring to Table 14-3, what is the estimated mean consumption level for an economy with GDP equal to $2 billion and an aggregate price index of 90? A) $1.39 billion B) $2.89 billion C) $4.75 billion D) $9.45 billion 22) Referring to Table 14-3, one economy in the sample had an aggregate consumption level.
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    171) Referring to Table 14-14, the fitted model for predicting mileages for 4-cylinder cars is ________. A) 40 - 0.05X1 B) 40 - 0.10X1 C) 60 - 0.10X1 D) 60 - 0.15X1   TABLE 14-15   The superintendent of a school district wanted to predict the percentage of students passing a sixth-grade proficiency test. She obtained the data.
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    91) Referring to Table 16-7, the fitted exponential trend equation to predict Y is ________. 92) Referring to Table 16-7, the forecast for the demand in 2009 is ________.   93) Referring to Table 16-7, the forecast for the demand in 2012 is ________.   TABLE 16-8   The manager of a marketing consulting firm has been.
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    121) Referring to Table 16-12, using the regression equation, what is the forecast for the revenues in the first quarter of 2012?   122) Referring to Table 16-12, using the regression equation, what is the forecast for the revenues in the fourth quarter of 2011?   123) Referring to Table 16-12, in testing the.
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    141) Referring to Table 16-13, what is your forecast for the 13th month using the quadratic-trend model?   142) Referring to Table 16-13, what is your forecast for the 13th month using the exponential-trend model? 143) Referring to Table 16-13, what is your estimated annual compound growth rate using the exponential-trend model?   144) Referring.
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    41) Which of the following terms describes the up and down movements of a time series that vary both in length and intensity? A) Trend B) Cyclical component C) Irregular component D) Seasonal component   42) The following is the list of MAD statistics for each of the models you have estimated from time-series data:   Model MAD Linear Trend 1.38 Quadratic.
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  51) In stepwise regression, an independent variable is not allowed to be removed from the model once it has entered into the model.   52) Using the Cp statistic in model building, all models with Cp ≤ (k + 1) are equally good.   TABLE 15-4   The superintendent of a school district wanted to predict.
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    81) Referring to Table 15-6, the variable X4 should be dropped to remove collinearity.   82) Referring to Table 15-6, the variable X5 should be dropped to remove collinearity.   83) Referring to Table 15-6, the variable X6 should be dropped to remove collinearity.   84) Referring to Table 15-6, what is the value of the.
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    51) Referring to Table 14-5, when the microeconomist used a simple linear regression model with sales as the dependent variable and wages as the independent variable, she obtained an r2 value of 0.601. What additional percentage of the total variation of sales has been explained by including capital spending in.
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    31) Referring to Table 14-4, which of the independent variables in the model are significant at the 5% level? A) Income, Size, School B) Income, Size C) Size, School D) Income, School   32) Referring to Table 14-4, when the builder used a simple linear regression model with house size (House) as the dependent variable and.
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    1) The control chart A) focuses on the time dimension of a system. B) captures the natural variability in the system. C) can be used for categorical, discrete, or continuous variables. D) All of the above.   2) Variation signaled by individual fluctuations or patterns in the data is called A) special or assignable causes. B) common or.
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  41) A regression diagnostic tool used to study the possible effects of collinearity is ________.   42) The ________ (larger/smaller) the value of the Variance Inflationary Factor, the higher is the collinearity of the X variables.   43) The logarithm transformation can be used A) to overcome violations to the autocorrelation assumption. B) to test for.
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    151) Referring to Table 16-13, you can conclude that the second-order autoregressive model is appropriate at the 5% level of significance.   152) Referring to Table 16-13, the best autoregressive model using the 5% level of significance is A) first-order. B) second-order. C) third-order. D) None of the above.   153) Referring to Table 16-13, what is your.
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    161) Referring to Table 16-14, the best interpretation of the coefficient of X (0.117) in the regression equation is A) the quarterly compound growth rate in contracts is around 30.92%. B) the annually compound growth rate in contracts is around 30.92%. C) the quarterly compound growth rate in contracts is around 11.7%. D) the.
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    1) The effect of an unpredictable, rare event will be contained in the ________ component. A) trend B) cyclical C) irregular D) seasonal   2) The overall upward or downward pattern of the data in an annual time series will be contained in the ________ component. A) trend B) cyclical C) irregular D) seasonal   3) The fairly regular fluctuations that occur.
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    41) Referring to Table 14-4, suppose the builder wants to test whether the coefficient on Income is significantly different from 0. What is the value of the relevant t-statistic? A) 5.286 B) 5.195 C) 3.945 D) -1.509   42) Referring to Table 14-4, at the 0.01 level of significance, what conclusion should the builder reach regarding.
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    61) Referring to Table 16-4, a centered 5-year moving average is to be constructed for the wine sales. The moving average for 2008 is ________. 62) Referring to Table 16-4, construct a centered 5-year moving average for the wine sales.   63) Referring to Table 16-4, exponential smoothing with a weight or smoothing.
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    111) Referring to Table 16-11, based on the parsimony principle, the second-order model is the better model for making forecasts. TABLE 16-12   A local store developed a multiplicative time-series model to forecast its revenues in future quarters, using quarterly data on its revenues during the 4-year period from 2005 to 2009. The.
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    31) MAD is the summation of the residuals divided by the sample size.   32) The principle of parsimony indicates that the simplest model that gets the job done adequately should be used.   33) In selecting a forecasting model, you should perform a residual analysis.   34) Each forecast using the method of exponential smoothing.
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    101) Referring to Table 16-10, the residuals for the first-order autoregressive model are ________, ________, ________, ________, and ________. 102) Referring to Table 16-10, the value of the MAD for the first-order autoregressive model is ________. 103) Referring to Table 16-10, the fitted values for the second-order autoregressive model are ________, ________,.
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