× 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  
suncs suncs
wrote...
Posts: 505
Rep: 1 0
6 years ago
A regression analysis between sales (in 1000) and advertising (in 100) resulted in the following least squares line: y = 75 +6x. This implies that if advertising is 800, then the predicted amount of sales (in dollars) is:
 a. 4875
  b. 123,000
  c. 487,500
  d. 12,300
  e. 79,800

Q. 2

A regression analysis between weight (y in pounds) and height (x in inches) resulted in the following least squares line: y = 120 + 5x. This implies that if the height is increased by 1 inch, the weight, on average, is expected to:
 a. increase by 1 pound
  b. decrease by 1 pound
  c. increase by 5 pounds
  d. increase by 24 pounds
  e. increase by 125 pounds

Q. 3

Given the least squares regression line y = 5 - 2x:
 a. the relationship between x and y is positive
  b. the relationship between x and y is negative
  c. as x increases, so does y
  d. as x decreases, so does y
  e. y is the square of x

Q. 4

If an estimated regression line has a y-intercept of 10 and a slope of 4, then when x = 2 the actual value of y is:
 a. 18
  b. 15
  c. 14
  d. unknown
  e. 2

Q. 5

Which of the following statements is true?
 a. In a simple linear regression model, if the regression slope coefficient is negative, then the standard error of the estimate will be positive.
  b. In a simple linear regression model, the regression slope coefficient will have the same sign as the correlation coefficient.
  c. If two variables are determined to be correlated, there is no reason to believe that the regression model involving the same two variables will be statistically significant.
  d. All of these.

Q. 6

In a simple linear regression analysis, the standard error of the slope is:
 a. a measure of the amount of change in the dependent variable y for a one unit change in the independent variable x
  b. a measure of the variation in the regression slope from sample to sample
  c. the square root of the standard error of the estimate
  d. the square of the standard error of the estimate
  e. all of these

Q. 7

In a simple linear regression analysis, if SSE = 27, Total SS = 63, then the percentage of the variation in the dependent variable y that is explained by the independent variable x is about:
 a. 43
  b. 27
  c. 63
  d. 57
  e. 36
Read 29 times
3 Replies

Related Topics

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

B

Answer to #2

C

Answer to #3

B

Answer to #4

D

Answer to #5

D

Answer to #6

B

Answer to #7

D
suncs Author
wrote...
6 years ago
Nice!
wrote...
6 years ago
Happy Dummy
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  944 People Browsing
 112 Signed Up Today
Related Images
  
 225
  
 16
  
 276
Your Opinion
What's your favorite coffee beverage?
Votes: 274