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

Lp model, A company produce three sizes of windows fans small,medium and la...

A company produce three sizes of windows fans small,medium and large. The manager has formulated an LP model for production.

Limitations of operational researchers, Among other limitations of O. R the...

Among other limitations of O. R the followings deserve mention: a. Basis: The operational researchers must be unbiased. An attempt to shoehorn result sin to a confirmation of ma

Management Applications of Operation Research, Some areas of applications a...

Some areas of applications are Purchasing, Procurement and Exploration Quantities and timing of purchase Replacement policies Rules for buying, supplies Finance, Budgeting and Inv

Demerits of range - measure of dispersion , Demerits  of Range a.It g...

Demerits  of Range a.It gives  importance  to the  two  extreme  values and is very much affected by the extreme items. b.The range  provides  no information  about the  st

Inability of nih, Inability of NIH, FDA, to Identify Conflict of Interest ...

Inability of NIH, FDA, to Identify Conflict of Interest While federal regulations require that researchers receiving NIH grants remain free of financial conflicts of interest,

Operations research 2, management wants to know how many supervisors should...

management wants to know how many supervisors should be hired, and what could be the optimum workload distribution to be applied, given a number of constraints

Optimization , A company uses 4 pounds of resource 1 to make each unit of X...

A company uses 4 pounds of resource 1 to make each unit of X1 and 3 pounds of resource 1 to make each unit of X2. There are only 150 pounds of resource 1 available. Which of the fo

Graphic , max z 60x1+50x2 Sab to 4x1+10x2 2x1+2x2 3x...

max z 60x1+50x2 Sab to 4x1+10x2 2x1+2x2 3x1+2x2 X1+x2. >_ o

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