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 43 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
YES! Correct, THANKS for helping me on my review

mcabuhat

  • Member
  • Posts: 344
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it. In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it.
What Is a Standard Drink? What Is a Standard Drink?
Assume z is a standard normal random variable. What is the value of z if the area to the right ... Assume z is a standard normal random variable. What is the value of z if the area to the right ...
The coefficient of the restitution of an object is defined as the ratio of its outgoing to ... The coefficient of the restitution of an object is defined as the ratio of its outgoing to ...
Correlation between the Mendelian postulates of segregation Correlation between the Mendelian postulates of segregation
Table - Correlation Analysis Table - Correlation Analysis
Video: Ventilation - phases and driving forces

For a complete list of videos, visit our video library