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Author Question: Assuming a linear relationship between X and Y, if the coefficient of correlation (r) equals -0.75, ... (Read 79 times)

stephzh

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on: Jun 24, 2018
Assuming a linear relationship between X and Y, if the coefficient of correlation (r) equals -0.75, this means that:
 a. there is very weak correlation.
  b. the slope b1 is = -0.75.
  c. the value of X is always greater than the value of Y.
  d. None of these choices are true.

Question 2

If the standard deviation of x is 18, the covariance of x and y is 120, the coefficient r = 0.90, then the standard deviation of y is 54.87.
  Indicate whether the statement is true or false


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srodz

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

B

Answer to Question 2

F


stephzh

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Reply 2 on: Jun 24, 2018
Great answer, keep it coming :)

juliaf

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Reply 3 on: Yesterday
Wow, this really help

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