statistics at helpwithassignment com regression
Download
Skip this Video
Download Presentation
statistics at helpwithassignment.com (regression)

Loading in 2 Seconds...

play fullscreen
1 / 11

statistics at helpwithassignment.com (regression) - PowerPoint PPT Presentation


  • 259 Views
  • Uploaded on

Regression is an important concept in Statistics. Regression is used to measure the relation between two or more variables where one is independent and the others are dependant variables. Regression can be used to predict the dependant variable when the independent variable is known./n

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'statistics at helpwithassignment.com (regression)' - assignment_maker


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
regression
Regression
  • Regression is an important concept in Statistics. Regression is used to measure the relation between two or more variables where one is independent and the others are dependant variables. Regression can be used to predict the dependant variable when the independent variable is known.
  • www.HelpWithAssignment.com
regression3
Regression
  • We can see an example to understand regression clearly.
  • Q: The regression line known as the least squares line is a plot of the expected value of the dependant variable of all values of the independent variable. In regression equation, y is always the dependant variable and x is always the independent variable.
  • www.HelpWithAssignment.com
correlation example problem
Correlation Example Problem
  • The sales of a company (in million dollars) for each year are shown in the table below.
  • a) Find the least square regression line y = ax + b.
  • b) Use the least squares regression line as a model to estimate the sales of the company in 2012.
  • www.HelpWithAssignment.com
correlation example problem5
Correlation Example Problem
  • Sol: a) We first change the variable x into t such that t = x - 2005 and therefore t represents the number of years after 2005. Using t instead of x makes the numbers smaller and therefore manageable. The table of values becomes.
  • www.HelpWithAssignment.com
correlation example problem6
Correlation Example Problem
  • a) We first change the variable x into t such that t = x - 2005 and therefore t represents the number of years after 2005. Using t instead of x makes the numbers smaller and therefore manageable. The table of values becomes.
  • www.HelpWithAssignment.com
correlation example problem7
Correlation Example Problem
  • We now use the table to calculate a and b included in the least regression line formula.
  • www.HelpWithAssignment.com
correlation example problem8
Correlation Example Problem
  • We now calculate a and b using the least square regression formulas for a and b.
  • www.HelpWithAssignment.com
correlation example problem9
Correlation Example Problem

b = =

= 11.6

  • In 2012, t = 2012 - 2005 = 7 The estimated sales in 2012 are: y = 8.4 × 7 + 11.6 = 70.4 million dollars.
  • www.HelpWithAssignment.com
helpwithassignment com
HelpWithAssignment.com
  • At HelpWithAssignment.com we provide best quality Assignment help, Homework help, Online Tutoring and Thesis and Dissertation help as well. For any of the above services you can contact us at http://www.helpwithassignment.com/ andhttp://www.helpwithassignment.com/statistics-assignment-help
  • www.HelpWithAssignment.com
helpwithassignment com11
HelpWithAssignment.com
  • You can follow us on our blogs at http://helpwithassignment.blogspot.com/ and

http://helpwithassignment.wordpress.com/

Thank You

  • www.HelpWithAssignment.com
ad