× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
djutopia djutopia
wrote...
Posts: 380
Rep: 0 0
6 years ago


  Which of the following explains interaction in a multiple regression model?
   
  a.Interaction always occurs when there are more than two predictors in a model.
  b.Interaction occurs when two independent variables do not depend on the value of each other when determining their effect on the dependent variable.
  c.Interaction occurs when the effect on the dependent variable of a change in one predictor, holding the other constant, depends on where that other variable is held constant.
  d.The interaction effect is always equal to zero.

Q. 2


  Which of the following is a first order model?
 

  a.y = 2.1 + 1.3x1 + 4.1x2 + 0.5x1x2
  b.y = 2.1 + 1.3x1 + 4.1x2
  c.y = 2.1 + 0.5log(x1)
  d.y = 2.1 + 1.3x12

Q. 3


  What is the 95 confidence interval for the coefficient of Section?
 
 

  a.(-0.184, 0.504)
  b.(0.004, 0.008)
  c.(-1.05, 0.683)
  d.(-1.23, 0.865)

Q. 4


  What is the value of in the following equation, Cadmium = 80.6 + 15.1 Rate + 49.1 Harvest?
 

  a.49.1
  b.It depends on the values of Harvest and Rate.
  c.80.6
  d.15.1

Q. 5


  When is small, what is the assessment of the regression model?
 

  a.useless
  b.perfect
  c.good
  d.poor

Q. 6


  When is small, what is the assessment of the regression model?
 

  a.useless
  b.perfect
  c.good
  d.poor

Q. 7


  When R2 = 0, which other value is necessarily zero?
 

  a.
  b.
  c.SS(Residual)
  d.F

Q. 8

In an analysis of variance for a multiple regression model, what does a large value of the test statistic, F, indicate?
   
  a.Most of the variation in y is unexplained by the regression equation and the model is not useful.
  b.Most of the variation in y is explained by the regression equation and the model is useful.
  c.There is a lot of error in the model.
  d.We should not reject the null hypothesis.
Read 53 times
2 Replies

Related Topics

Replies
wrote...
6 years ago
Answer to #1

correct: c

Answer to #2

correct: b

Answer to #3

correct: d

Answer to #4

correct: d

Answer to #5

correct: c

Answer to #6

correct: c

Answer to #7

correct: d

Answer to #8

correct: b
djutopia Author
wrote...
6 years ago
Happy Dummy I'm impressed
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  837 People Browsing
Related Images
  
 489
  
 249
  
 288
Your Opinion
Who's your favorite biologist?
Votes: 585