This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: If the coefficient of correlation r = 0 .80, the standard deviations of X and Y are 20 and 25, ... (Read 29 times)

vicky

  • Hero Member
  • *****
  • 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.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

janeli1

  • Sr. Member
  • ****
  • Posts: 330
Reply #1 on: Jun 24, 2018
Answer to Question 1

TRUE

Answer to Question 2

B


vicky

  • Member
  • Posts: 586
Reply 2 on: Jun 24, 2018
Great answer, keep it coming :)

amit

  • Member
  • Posts: 364
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

CycleBeads help women use the Standard Days Method. CycleBeads help women use the Standard Days Method.
Generalized pressure drop correlation Generalized pressure drop correlation
a) Standard PCR machine used for genotyping and (b) agarose gel to detect DNA fragments. a) Standard PCR machine used for genotyping and (b) agarose gel to detect DNA fragments.
How to sketch a quadratic equation that is in standard form (Question 1) How to sketch a quadratic equation that is in standard form (Question 1)
Correlation Between Video Games and Spatial Skills in Youth Correlation Between Video Games and Spatial Skills in Youth
Table - Correlation Analysis Table - Correlation Analysis
Video: Double Vacuum Process (Illustration No Audio)

For a complete list of videos, visit our video library