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

LINEAR PROGRAMMING, A DRUG MANUFACTURER produces 2 products X1 and X2.X1 ne...

A DRUG MANUFACTURER produces 2 products X1 and X2.X1 needs 2 hours on machine A AND 2 HOURS ON MACHINE B.X2 needs 3 hours on machine A and 1 hour on machine B.If machine A can run

Coding and retrieval , Coding  and Retrieval  If all your  data ar...

Coding  and Retrieval  If all your  data are  word processed on in some  other  computer readable form  it will  be possible  for your  primary  documents  to be accessed d

Inventory Control Model, 1. A local university purchases exercise books to ...

1. A local university purchases exercise books to give to their students. Instead of a fixed unit cost, their supplier quotes the following discount pricing: Order quantity Unit P

User groups - information resources, User Groups: The next step would ...

User Groups: The next step would be to identify more specifically the potential user groups. This may be done on the basis of interviews, questionnaires, study of organisation

Machine tabulation, Machine  Tabulation This methods  of tabulating i...

Machine  Tabulation This methods  of tabulating information  is generally used in  case of extensive  large scale  surveys. Mechanical sorting and tabulating equipments and su

A paper mill produces, . A paper mill produces two grades of paper viz., X ...

. 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

Techniques of work measurement, Techniques  of Work  Measurement A n...

Techniques  of Work  Measurement A number of work  measurement  techniques  have been  developed  to suit  different  types of work . There are: 1. Repetitive work: The

Linear programming problem, A paper mill produces two grades of paper viz.,...

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

Explain the history of boots and shoes, Question 1 Explain any five access...

Question 1 Explain any five accessory industries Question 2 Explain the history of boots and shoes Question 3 Write short notes on following- Types of Gujarati emb

#title scope.., scope of the operation research in modern management?

scope of the operation research in modern management?

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