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Author Question: If the coefficient of correlation r = 0 .80, the standard deviations of X and Y are 20 and 25, ... (Read 46 times)

vicky

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  • Posts: 586
on: Jun 24, 2018
If the coefficient of correlation r = 0 .80, the standard deviations of X and Y are 20 and 25, respectively, then Cov(X, Y) must be 400.
 a. True
  b. False
   Indicate whether the statement is true or false

Question 2

The test for the equality of two population variances is based on the:
 a. difference between the two sample variances.
  b. ratio of the two sample variances.
  c. sum of the two sample variances.
  d. product of the two sample variances.


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janeli1

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

TRUE

Answer to Question 2

B


vicky

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  • Posts: 586
Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

komodo7

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Reply 3 on: Yesterday
Excellent

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