« 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 79 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?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Standard Alcoholic Drink Sizes Standard Alcoholic Drink Sizes
Standard Medical Record and Types of Reports Found in Record Standard Medical Record and Types of Reports Found in Record
Summary of Standard Precautions Summary of Standard Precautions
Standard Precautions for the Care of all Patients in All Health Care Settings Standard Precautions for the Care of all Patients in All Health Care Settings
What Is a Standard Drink? What Is a Standard Drink?
Measuring the client’s weight with a standard platform scale Measuring the client’s weight with a standard platform scale
Video: Spermatogenesis Animation

For a complete list of videos, visit our video library