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CORRELATION
Correlation is the study of the liner relationship between two variable when there is a relationship of quantitative measures between two set of variable the appropriate statistical tool for measuring the relationship and expressing each in a precise way is known as correlation. For example there is a relationship between the heights and weights of persons demand and prices of commodities etc.
According to W.I. King Correlation means that between two series or groups of data there exists some relationship connections.
According to croxton and Cowden" The appropriate statistical tool for discovering and measuring the relationship of quantitative nature and expressing it in brief formula is known as correlation.
The coefficient of correlation measures the degree of relationship between two set of figures. As the reliability of estimates depend upon the closeness of the relationship it is imperative that utmost care be taken while interpreting the value of coefficient of correlation otherwise fallacious conclusion can be draw.
Maximize Z= 3x1 + 2X2 Subject to the constraints: X1+ X2 = 4 X1 - X2 = 2 X 1, X2 = 0
These models are used to develop a method to evaluate the merit of alternative courses or action by representing with a mathematical model of the problems where various variab
Chi Square Test Goodness of Fit Chi square test can be used to find out how well the theoretical distribution fit with the empirical distribution of observed distribut
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
maximum 3x1+x2+x3-x4 subject to x1+5x2+3x3+4x4 x1+x2=-1 x3+x4
Methods of Survey and Study: Some methods of collecting information about the organisation and about the information requirement of potential users are mentioned below. No si
Operation research makes no allowance for intangible factors such as skill attitude vigor of the management people in taking decisions but in many instances success or fail
scope of operation research
Use Big M method to Maximize(Z)=3_(x_1 )+2_(x_2 ) Subject to 3_(x_1 )+?1.5?_(x_2 )=30 x_1+x_2=20 x_1=0 x_2=0
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