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

Operation Research Models, Explain the classification of models 1. Classifi...

Explain the classification of models 1. Classification by function or uses 2. Classification by degree of qualification 3. Classification by physical characteristics 4. Classidicat

Meaning of research report - report writing presentation, Meaning of Resear...

Meaning of Research Report Research  report is the process of communicating  the  results  of an investigation it  is a document which  reflect about  the research conducted a

Conclusions and recommendations , Conclusions and Recommendations  Con...

Conclusions and Recommendations  Conclusions  should  be drawn with  direct  reference to the objectives  of the study. The  readers should  be able  to read the objectives. T

North west corner rule, North West Corner Rule for Initial Solution: Now ...

North West Corner Rule for Initial Solution: Now by applying North West corner rule we can initial solution. According to this rule without regard to cost consideration the

Sample size in non propbability- sampling decisions, Sample Size in Non Pro...

Sample Size in Non Propbability The probability  selection does not apply  to purposive  selection. The size  of the  non  probability samples  is selected  in a subjective ma

Or, .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

requirements and characteristics of a good table , Requirements and Charac...

Requirements and Characteristics of a good table In the words  of Mr. Harry Jerome a good statistical table  is a triumph of ingenuity and  technique masterpiece of economy  o

Cross cultural communication in the workplace, This assignment requires you...

This assignment requires you to carry out the first part of a research project on the topic of "Cross cultural communication in the workplace". You can take any approach to this to

Performance analysis of video call using skype, Description      Skype i...

Description      Skype is currently the most popular VoIP software in the world. Existing research has indicated that Skype can provide better voice/video quality in adverse net

Linear programming, nass food produces to kinds of popular dark chocolate b...

nass food produces to kinds of popular dark chocolate bars.the banana and coffee. the banana bar costs 0.22 to make and sells of 0.35, where as the coffee bar costs 0.40 to make an

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