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UCF QMB 3200 FINAL EXAM 175 QUESTIONS AND CORRECT ANSWERS 2022/2023|ALREADY GRADED A+
UCF QMB 3200 FINAL EXAM 175 QUESTIONS AND CORRECT ANSWERS 2022/2023|ALREADY GRADED A+
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UCF QMB 3200 FINAL EXAM 175 QUESTIONS ANDCORRECT ANSWERS 2022/2023|ALREADY GRADED A+
A variable that cannot be measured in numerical terms is called a _____.
a. dependent variable
b. constant variable
c. qualitative variable
d. non-measurable random variable --CORRECT ANSWER-- c. qualitative variable
The difference between the observed value of the dependent variable and the value
predicted by using the estimated regression equation is the _____.
a. standard error
b. residual
c. predicted interval
d. variance --CORRECT ANSWER-- b. residual
In a multiple regression model, the error term ε is assumed to _____.
a. have a standard deviation of 1
b. have a variance of 0
c. be normally distributed
d. have a mean of 1 --CORRECT ANSWER-- c. be normally distributed
A variable that takes on the values of 0 or 1 and is used to incorporate the effect of
qualitative variables in a regression model is called a(n) _____.
a. dummy variable
b. outlier
c. interaction
d. constant variable --CORRECT ANSWER-- a. dummy variable
A term used to describe the case when the independent variables in a multiple
regression model are correlated is _____.
a. correlation
b. multicollinearity
c. regression
d. linearity --CORRECT ANSWER-- b. multicollinearity
In regression analysis, an outlier is an observation whose _____.
a. mean is larger than the standard deviation
b. mean is 0
,c. residual is 0
d. residual is much larger than the rest of the residual values --CORRECT ANSWER--
d. residual is much larger than the rest of the residual values
In a multiple regression model, the error term ε is assumed to be a random variable with
a mean of _____.
a. 0
b. 1
c. any value
d. −1 --CORRECT ANSWER-- a. 0
Exhibit 15-4
a. y = β0 + β1x1 + β2x2 + ε
b. E(y) = β0 + β1x1
c. ŷ = b0 + b1 x1 + b2 x2
d. E(y) = β0 + β1x1 + β2x2
Which equation describes the multiple regression model?
a. equation d
b. equation b
c. equation a
d. equation c --CORRECT ANSWER-- c. equation a
In a multiple regression model, the values of the error term, ε, are assumed to be
_____.
a. independent of each other
b. dependent on each other
c. 0
d. always negative --CORRECT ANSWER-- a. independent of each other
A measure of goodness of fit for the estimated regression equation is the _____.
a. sample size
b. mean square due to error
c. multiple coefficient of determination
d. mean square due to regression --CORRECT ANSWER-- c. multiple coefficient of
determination
Exhibit 15-4
a. y = β0 + β1x1 + β2x2 + ε
b. E(y) = β0 + β1x1
c. ŷ = b0 + b1 x1 + b2 x2
d. E(y) = β0 + β1x1 + β2x2
Which equation describes the multiple regression equation?
a. equation a
b. equation b
,c. equation c
d. equation d --CORRECT ANSWER-- d. equation d
As the goodness of fit for the estimated multiple regression equation increases, _____.
a. the value of the regression equation's constant b0 decreases
b. the value of the correlation coefficient increases
c. the value of the multiple coefficient of determination increases
d. the value of the adjusted multiple coefficient of determination decreases --CORRECT
ANSWER-- c. the value of the multiple coefficient of determination increases
In multiple regression analysis, the correlation among the independent variables is
termed _____.
a. adjusted coefficient of determination
b. multicollinearity
c. linearity
d. collinearity --CORRECT ANSWER-- b. multicollinearity
The adjusted multiple coefficient of determination is adjusted for _____.
a. the number of independent variables
b. the number of equations
c. detrimental situations
d. the number of dependent variables --CORRECT ANSWER-- a. the number of
independent variables
In regression analysis, the response variable is the _____.
a. slope of the regression function
b. intercept
c. independent variable
d. dependent variable --CORRECT ANSWER-- d. dependent variable
Exhibit 15-4
a. y = β0 + β1x1 + β2x2 + ε
b. E(y) = β0 + β1x1
c. ŷ = b0 + b1 x1 + b2 x2
d. E(y) = β0 + β1x1 + β2x2
Which equation gives the estimated regression line?
a. equation c
b. equation d
c. equation a
d. equation b --CORRECT ANSWER-- a. equation c
A variable that cannot be measured in terms of how much or how many but instead is
assigned values to represent categories is called a(n) _____.
a. category variable
b. constant variable
, c. qualitative variable
d. interaction --CORRECT ANSWER-- c. qualitative variable
For a multiple regression model, SSR = 600 and SSE = 200. The multiple coefficient of
determination is _____.
a. .275
b. .333
c. .300
d. .75 --CORRECT ANSWER-- d. .75
A multiple regression model has _____.
a. more than one independent variable
b. at least two dependent variables
c. only one independent variable
d. more than one dependent variable --CORRECT ANSWER-- a. more than one
independent variable
In a multiple regression model, the variance of the error term ε is assumed to be _____.
a. the same for all values of the dependent variable
b. the same for all values of the independent variable
c. −1
d. 0 --CORRECT ANSWER-- b. the same for all values of the independent variable
To test for the significance of a regression model involving 14 independent variables
and 255 observations, the numerator and denominator degrees of freedom
(respectively) for the critical value of F are _____.
a. 13 and 240
b. 14 and 255
c. 14 and 240
d. 255 and 14 --CORRECT ANSWER-- c. 14 and 240
A test to determine whether or not first-order autocorrelation is present is _____.
a. a chi-square test
b. the Durbin-Watson test
c. a t test
d. an F test --CORRECT ANSWER-- b. the Durbin-Watson test
The correlation in error terms that arises when the error terms at successive points in
time are related is termed _____.
a. autocorrelation
b. parallel correlation
c. multicorrelation
d. leverage --CORRECT ANSWER-- a. autocorrelation
The joint effect of two variables acting together is called _____.
a. joint regression
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