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Author Question: In studying the relationship between two variables x and y, a scatterplot can be used to detect ... (Read 123 times)

Pineappleeh

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on: Jul 24, 2018
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.


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samiel-sayed

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

D

Answer to Question 2

B


Pineappleeh

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Reply 2 on: Jul 24, 2018
Excellent

sultana.d

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Reply 3 on: Yesterday
Gracias!

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