« previous next »

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 44 times)

pragya sharda

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

TRUE

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

Your heart beats over 36 million times a year.

CycleBeads help women use the Standard Days Method. CycleBeads help women use the Standard Days Method.
Three standard sizes of cuffs: a small cuff for a child or frail adult; a normal-sized adult cuff; ... Three standard sizes of cuffs: a small cuff for a child or frail adult; a normal-sized adult cuff; ...
Standard precaution guidelines. Additional guidelines/protocols may be utilized depending on the ... Standard precaution guidelines. Additional guidelines/protocols may be utilized depending on the ...
Cumulative Standard Normal Distribution Cumulative Standard Normal Distribution
How to write a quadratic equation in standard form when a graph is given How to write a quadratic equation in standard form when a graph is given
Common Causes of Walking Gait Deviations Common Causes of Walking Gait Deviations
Video: Dietary Cholesterol & LDL

For a complete list of videos, visit our video library