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

Author Question: Testing the null hypothesis that the slope of the true regression line equals zero is equivalent to ... (Read 122 times)

dollx

  • Hero Member
  • *****
  • Posts: 558
on: Jun 24, 2018
Testing the null hypothesis that the slope of the true regression line equals zero is equivalent to testing whether the true coefficient of correlation could be zero. Why?

Question 2

The values of y and x are inversely related, and 84.64 of the variation in y is explained by the regression equation. What is the coefficient of correlation?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

yuyiding

  • Sr. Member
  • ****
  • Posts: 357
Reply #1 on: Jun 24, 2018
Answer to Question 1

If the slope of the true regression line is zero, then the true coefficient of correlation is also zero. Both of these cases imply no linear relationship between the dependent variable (y) and the independent variable (x).

Answer to Question 2

Since 84.64 of the variation in y is explained by x .8464 is the coefficient of determination. The square root of the coefficient of determination, with the appropriate sign, is equal to the coefficient of correlation. Therefore, the coefficient of correlation is -.92 . We know this is negative because y and x are inversely related.


dollx

  • Member
  • Posts: 558
Reply 2 on: Jun 24, 2018
Gracias!

parshano

  • Member
  • Posts: 333
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

TrUe....FaLsE TrUe....FaLsE
Testing a Simple Hypothesis Testing a Simple Hypothesis
Testing Distance Visual Acuity Using a Snellen Eye Chart Testing Distance Visual Acuity Using a Snellen Eye Chart
Calcium metabolism in osteoporosis: (a) bone deposition equals bone resorption; (b) bone resorption ... Calcium metabolism in osteoporosis: (a) bone deposition equals bone resorption; (b) bone resorption ...
Oil Pressure Testing Oil Pressure Testing
Number line for rounding Number line for rounding
Video: Definitions of stroke volume, preload definition & Factors influencing stroke volume

For a complete list of videos, visit our video library