In studying the relationship between two variables x and y, a ...

[Pineappleeh]

In studying the relationship between two variables x and y, a scatterplot can be used to detect which of the following?
 a. A positive linear relationship.
  b. A negative linear relationship.
  c. A relationship that is not linear.
  d. All of these.
  e. None of these.

Question 2

Which of the following statements about simple correlation analysis are correct?
 a. When all the points in a scatter diagram lie precisely on the estimated regression line, the sample coefficient of correlation will equal 0.
  b. When all the points in a scatter diagram lie precisely on the estimated regression line, the sample coefficient of correlation will show the variables to be perfectly correlated.
  c. When all the points in a scatter diagram are so widely scattered as to make x completely worthless as a predictor of y, the sample coefficient of correlation will equal 1.
  d. All of these.
  e. None of these.

[samiel-sayed]

Answer to Question 1

D

Answer to Question 2

B

[Pineappleeh]

Gracias!

[jackie]

Excellent