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Author Question: A _____ is a graphical presentation of the relationship between two quantitative variables. a. ... (Read 65 times)

roselinechinyere27m

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on: Jun 24, 2018
A _____ is a graphical presentation of the relationship between two quantitative variables.
 a. histogram
  b. bar chart
  c. pie chart
  d. scatter chart

Question 2

Discuss some of the signals for the presence of multicollinearity.


alexanderhamilton

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Reply #1 on: Jun 24, 2018
Answer to Question 1

D

Answer to Question 2

There are several clues to the presence of multicollinearity: (1) an independent variable known to be an important predictor ends up having a partial regression coefficient that is not significant; (2) a partial regression coefficient exhibits the wrong sign; and/or, (3) when an independent variable is added or deleted, the partial regression coefficients for the other variables change dramatically. A more practical way to identify multicollinearity is through the examination of a correlation matrix, which is a matrix that shows the correlation of each variable with each of the other variables. A high correlation between two independent variables is an indication of multicollinearity.


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