Graphic methods - correlation regression analysis, Operation Research

Assignment Help:

Graphic Methods

a.Scatter Diagram: Scatter  diagram  is a special  type of dot chart.  Under  this methods  the given data are  plotted in  a graph  paper  in the form of  dot. For each  pair of  or x and y values  we plot a dot( or  point) and thus  we obtain  many  dots equal in number of observation. If now these  plotted dotes  or points  show some  trends  either  upwards or downwards then the two variables  ( x and y) are said to  be correlated or otherwise not correlated. If  again  the trend of points  is upwards  moving  from  lower left hand corner to upper right hand corner then correlation is positive  ( r=+1) r is  coefficient  or correlation. On the  other hand if movement is reverse i, e,  dots  move  from  upper  left hand  corner  to lower right  hand corner then correlation  is negative (r= -1). The  idea  will be  clear from  diagram given  below:

1802_Graphic Methods.png

 

                    Positive Correlation                    Negative  Correlation

 

In fig (a) the values  of the two  variable  move in the same  direction the correlation is  positive and r= 1.

 In figure (b) we  find  negative  correlation and r= 1 as the values  move in  reverse direction.

 In figures (c) we dont  get any  trend  lying  and heance it shows  the  absence  of correlation  and r= 0.

 

 


Related Discussions:- Graphic methods - correlation regression analysis

Explain system control and security tools, 1. Explain the effects that MIS,...

1. Explain the effects that MIS, DSS, CRM and ERP have on organizational communication and decision making to increase productivity and efficiency in an increasingly competitive bu

Essentials of a good scientific methods, Requisites of a Good Scientific Me...

Requisites of a Good Scientific Methods The essentials of a good scientific methods as summed up by the advisory committee on economic and social research of the council of

Uses of mode - measure of central tendency, Uses of Mode The  use of t...

Uses of Mode The  use of the mode is recommended in the following  situations: a.When a quick  and approximate measures of  central tendency desired. b.When the  measure

Vogel approximation methods, This method is more  systematic and orderly th...

This method is more  systematic and orderly than least cost method. Here penalties for each column and row of the transportation table are determined, and the row  or  column with

Data and information, Data and Information: The term "data" (plural fo...

Data and Information: The term "data" (plural form of datum) refers to "an individual fact, statistic, or a piece of information or a group or a body of facts, statistics or t

LPP, A paper mill produces two grades of paper viz., X and Y. Because of ra...

A paper mill produces two grades of paper viz., X and Y. Because of raw material restrictions, it cannot produce more than 400 tons of grade X paper and 300 tons of grade Y paper i

Objectives of strategic management, Problem What are important objectiv...

Problem What are important objectives of strategic management and the causes for failure t of strategic management Objectives To keep pace with the changing business e

Non-documentary sources and institutional resources, Non-Documentary Source...

Non-Documentary Sources: On the other hand, non-documentary sources are institutional and human resources, both of which are important links in the information-transfer chain.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd