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Author Question: If the standard deviations of X and Y are 15.5 and 10.8, respectively, and the covariance of X and Y ... (Read 78 times)

pragya sharda

  • Hero Member
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  • Posts: 566
on: Jun 24, 2018
If the standard deviations of X and Y are 15.5 and 10.8, respectively, and the covariance of X and Y is 128.8, then the correlation coefficient is approximately 0.77.
 a. True
  b. False
   Indicate whether the statement is true or false

Question 2

The ratio of two independent chi-squared variables divided by their degrees of freedom is:
 a. normally distributed
  b. Student t-distributed
  c. chi-squared distributed
  d. F-distributed


pikon

  • Sr. Member
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  • Posts: 361
Reply #1 on: Jun 24, 2018
Answer to Question 1

TRUE

Answer to Question 2

D


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