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In this method variables beings studied are controlled by the investigator. In other the effect of one variable is observed while other relevant variables are held constant.
This methods includes field experiment as well as laboratory experimentation. In field experiment the study is conducted b comparing experimental group with the control group. In laboratory experiment the investigator creates a situation with the exact conditions he wants to have and in which he controls some and manipulates other variables. He then observes and measures the effect of the manipulation of the independent variables on the dependent variables in a situation in which the operation of other relevant factors is held to a minimum.
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
Higher Order Table When three or more characteristics are represented in the same table such a table is called higher order table. The need for such a table arises
Inherent forces fomenting conflicts of interest Several forces have coalesced to increase the incidence of conflicts of interest in the medical industry: the vertical integrat
Meaning and Definition If a group of N observations is arranged in ascending or descending order of magnitude then the middle value is called median of these observat
An integer programming problem is identical to a linear programming problem except that one or more decision variables are constrained to take integer values. Such problems cannot
ABC Bank faces a decision to hire two clerks or lease two automatic teller machines. Service rates of clerk 1 and clerk 2 are 41 customers per hour and 36 customers per hour respec
Maximize Z= 3x1 + 2X2 Subject to the constraints: X1+ X2 = 4 X1 - X2 = 2 X1, X2 = 0
Question : (a) (i) What do you understand by the term "operations research"? (ii) Discuss three common operations research models. (b) Self-service at the university c
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