Question 1

A linear trend equation is used to represent time-series values when the data are changing by equal ________.

Accepted Answer

A) percents 
B) proportions 
C) amounts 
D) both percents and proportions 
A) percents 
B) proportions 
C) amounts 
D) both percents and proportions

Question 2

In a linear trend equation,which variable represents the average change in the dependent variable for every unit change in time?

Accepted Answer

A) a 
B) b 
C) t 
D)    
A) a 
B) b 
C) t 
D)

Question 3

The trend forecast equation is   = 50 + 420t. The next forecast is for period 10. The typical seasonal index for period 10 is 1.25. What are the forecast sales for period 10?

Accepted Answer

A) 4,200 
B) 4,250 
C) 5,313 
D) 1,075 
A) 4,200 
B) 4,250 
C) 5,313 
D) 1,075

Question 4

The trend forecast equation is Ŷ = 120 + 100t. The next forecast is for period 8. The typical seasonal index for period 8 is 0.80. What are the forecast sales for period 8?

Accepted Answer

A) 736 
B) 920 
C) 800 
D) 640 
A) 736 
B) 920 
C) 800 
D) 640

Question 5

What is the correct order of events in a typical business cycle?

Accepted Answer

A) Prosperity,recession,depression,and recovery 
B) Depression,recovery,recession,and prosperity 
C) Recovery,depression,prosperity,and recession 
D) Recession,recovery,prosperity,and depression 
A) Prosperity,recession,depression,and recovery 
B) Depression,recovery,recession,and prosperity 
C) Recovery,depression,prosperity,and recession 
D) Recession,recovery,prosperity,and depression

Question 6

Episodic and residual variations can be projected into the future.

Accepted Answer

A) True 
 B)False

Question 7

The range of possible values for the Durbin-Watson statistic is ________.

Accepted Answer

A) any value 
B) any value greater than zero 
C) any value from zero to four inclusive 
D) any value less than zero 
A) any value 
B) any value greater than zero 
C) any value from zero to four inclusive 
D) any value less than zero

Question 8

If a major hurricane exerts an impact on the economy,that event could be classified as a(n)________.

Accepted Answer

A) secular trend 
B) episodic variation 
C) residual variation 
D) seasonal variation 
A) secular trend 
B) episodic variation 
C) residual variation 
D) seasonal variation

Question 9

The forecast for the third quarter is 1,000 units; the seasonal index for the quarter is 0.85. What are the seasonally adjusted sales for the quarter?

Accepted Answer

A) 1,085 
B) 850 
C) 985 
D) 1,015 
A) 1,085 
B) 850 
C) 985 
D) 1,015

Question 10

Autocorrelation is measured by the trend component of a time series.

Accepted Answer

A) True 
 B)False

Question 11

A time series is a collection of data that ________.

Accepted Answer

A) records past performance 
B) records future performance 
C) is limited to yearly data 
D) is limited to quarterly data 
A) records past performance 
B) records future performance 
C) is limited to yearly data 
D) is limited to quarterly data

Question 12

For the third quarter,the sales are 2,000 units; the seasonal index for the quarter is 1.15. What are the deseasonalized sales for the quarter?

Accepted Answer

A) 1,739 
B) 2,015 
C) 2,115 
D) 115 
A) 1,739 
B) 2,015 
C) 2,115 
D) 115

Question 13

If the past data approximates a straight line,the equation used is   = a + bt,where a is the Y-intercept and b is the slope of the line.

Accepted Answer

A) True 
 B)False

Question 14

The forecast for the third quarter is 3,000 units; the seasonal index for the quarter is 0.75. What are the seasonally adjusted sales for the quarter?

Accepted Answer

A) 3,000 
B) 3,079 
C) 2,250 
D) 1,015 
A) 3,000 
B) 3,079 
C) 2,250 
D) 1,015

Question 15

What is the general equation for the logarithmic trend equation to forecast Ŷ?

Accepted Answer

A) log a + log b(t) 
B) log at log b(t) 
C) at b(t) 
D) ab(t) 
A) log a + log b(t) 
B) log at log b(t) 
C) at b(t) 
D) ab(t)

Question 16

The moving average method smooths out the fluctuations in the data.

Accepted Answer

A) True 
 B)False

Question 17

If time-series data are plotted on graph paper having an arithmetic scale that increases or decreases by equal percents,what type of graph will it be?

Accepted Answer

A) Straight line 
B) Linear 
C) Curvilinear 
D) Logarithmic 
A) Straight line 
B) Linear 
C) Curvilinear 
D) Logarithmic

Question 18

In the linear trend equation,the letter b is the average change in   for each increase of one unit in t.

Accepted Answer

A) True 
 B)False

Question 19

What is an advantage of the least squares method for determining a trend line equation?

Accepted Answer

A) It minimizes the error sum of squares. 
B) It is subject to human error. 
C) Forecasts have zero error. 
D) It is easy to calculate by hand. 
A) It minimizes the error sum of squares. 
B) It is subject to human error. 
C) Forecasts have zero error. 
D) It is easy to calculate by hand.

Question 20

The Durbin-Watson statistic is used to analyze ________.

Accepted Answer

A) multicollinearity 
B) homoscedasticity 
C) autocorrelation 
D) variance inflation 
A) multicollinearity 
B) homoscedasticity 
C) autocorrelation 
D) variance inflation

A linear trend equation is used to represent time-series values when the data are changing by equal ________.

In a linear trend equation,which variable represents the average change in the dependent variable for every unit change in time?

The trend forecast equation is = 50 + 420t. The next forecast is for period 10. The typical seasonal index for period 10 is 1.25. What are the forecast sales for period 10?

The trend forecast equation is Ŷ = 120 + 100t. The next forecast is for period 8. The typical seasonal index for period 8 is 0.80. What are the forecast sales for period 8?

What is the correct order of events in a typical business cycle?

Episodic and residual variations can be projected into the future.

The range of possible values for the Durbin-Watson statistic is ________.

If a major hurricane exerts an impact on the economy,that event could be classified as a(n)________.

The forecast for the third quarter is 1,000 units; the seasonal index for the quarter is 0.85. What are the seasonally adjusted sales for the quarter?

Autocorrelation is measured by the trend component of a time series.

A time series is a collection of data that ________.

For the third quarter,the sales are 2,000 units; the seasonal index for the quarter is 1.15. What are the deseasonalized sales for the quarter?

If the past data approximates a straight line,the equation used is = a + bt,where a is the Y-intercept and b is the slope of the line.

The forecast for the third quarter is 3,000 units; the seasonal index for the quarter is 0.75. What are the seasonally adjusted sales for the quarter?

What is the general equation for the logarithmic trend equation to forecast Ŷ?

The moving average method smooths out the fluctuations in the data.

If time-series data are plotted on graph paper having an arithmetic scale that increases or decreases by equal percents,what type of graph will it be?

In the linear trend equation,the letter b is the average change in for each increase of one unit in t.

What is an advantage of the least squares method for determining a trend line equation?

The Durbin-Watson statistic is used to analyze ________.

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Nonparametric Methods: Nominal Level Hypothesis Tests

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters

Exam 18: Time Series and Forecasting

A linear trend equation is used to represent time-series values when the data are changing by equal ________.

In a linear trend equation,which variable represents the average change in the dependent variable for every unit change in time?

The trend forecast equation is = 50 + 420t. The next forecast is for period 10. The typical seasonal index for period 10 is 1.25. What are the forecast sales for period 10?

The trend forecast equation is Ŷ = 120 + 100t. The next forecast is for period 8. The typical seasonal index for period 8 is 0.80. What are the forecast sales for period 8?

What is the correct order of events in a typical business cycle?

Episodic and residual variations can be projected into the future.

The range of possible values for the Durbin-Watson statistic is ________.

If a major hurricane exerts an impact on the economy,that event could be classified as a(n)________.

The forecast for the third quarter is 1,000 units; the seasonal index for the quarter is 0.85. What are the seasonally adjusted sales for the quarter?

Autocorrelation is measured by the trend component of a time series.

A time series is a collection of data that ________.

For the third quarter,the sales are 2,000 units; the seasonal index for the quarter is 1.15. What are the deseasonalized sales for the quarter?

If the past data approximates a straight line,the equation used is = a + bt,where a is the Y-intercept and b is the slope of the line.

The forecast for the third quarter is 3,000 units; the seasonal index for the quarter is 0.75. What are the seasonally adjusted sales for the quarter?

What is the general equation for the logarithmic trend equation to forecast Ŷ?

The moving average method smooths out the fluctuations in the data.

If time-series data are plotted on graph paper having an arithmetic scale that increases or decreases by equal percents,what type of graph will it be?

In the linear trend equation,the letter b is the average change in for each increase of one unit in t.

What is an advantage of the least squares method for determining a trend line equation?

The Durbin-Watson statistic is used to analyze ________.

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Nonparametric Methods: Nominal Level Hypothesis Tests

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters