Lesson 8

Question 0

Repeat sales:

1) are useful for analyzing time trends
2) are useful in multiple regression analysis
3) are not useful for doing any analysis and should be removed from the dataset
4) none of the above

Answer 0

1)

Question 1

Which of the following are statistical tools that can be used to examine variables in a database? 
A. Crosstabualtion tables
B. Scatter plot
C. Chi-square test
D. Simple linear regression 

1) A and B only
2) A and D only
3) B C and D only
4) All of the above

Answer 1

4)

Question 2

The second step in regression analysis is Reviewing the Variables. The most important part of this step is to ensure:

1) that a variables in the database either fit into the general model or are information only
2) all the variables in the database are identified for inclusion in the model
3) variables needing transformations are identified
4) outliers in the data are identified are their records removed from the analysis

Answer 2

1)

Question 3

During the examine the variables step it is very important to ensure that:

1) only continuous variables with a high correlation to the dependent variable are considered for step 6 - list variables for calibration.
2) only discrete variables with significant separation between the boxes in a box plot against the dependent variable are considered for step 6- list variables for calibration
3) any collinearity among possible independent variables is noted so that certain combinations of variables can be avoided during 6 - List Variables for Calibration
4) all of the above

Answer 3

4)

Question 4

When testing a discrete variable against the Predicted Values to Actual sale price ratio to determine if the ratio is equitably distributed across the values of the discrete variables, the best combination of tests is:

1) a K-W test and a cross tab test
2) a K-W test and a ratio statistics test
3) a M-W test and a compare means test
4) a K-W test and a M-W test

Answer 4

2)

Question 5

When testing a continuous variable against the predicted value to actual sale price ratio to determine if the ratio is equitably distributed across the values of the continuous variable the best combination of tests is:

1) a scatter plot and a correlation matrix
2) a box plot and a correlation matrix
3) a K-W test and a scatter plot
4) a K-W test and a ratio statistics test

Answer 5

1)