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Chi square Test for the Population variance
When we want to test that a random sample has been drawn from a normal population having specified variance then X2 statistic under the null hypothesis for the random sample of n size will be.
X2 = ∑ (X- x¯) / = ns2/
With (n-1) = Degree of freedom
where S2= sample variance
X2= population variance
N= sample size
This value of X2 will be compared with the table value at (n-1) degree of freedom at certain level of significance for accepting or rejecting null hypothesis.
disadvantages of modeling in operational research
These models deal with the selection of an optimal course of action given the possible pay offs and their associated probability of occurrence. These models are broadly
Decision making is not only the headache of management rather all of us make decisions. We daily decide about minor issues. The essential characteristics of all decisions
Deriving the Solution from the Model: This phase is devoted to the computation of those value of decision variables that maximize or minimize the objective function. Such
what is the scope of operational research in india ? explain with the job names.
a. Discuss the methodology of Operations Research.
Disadvantages of Mode a.It is ill defined. b.It is indefinite and it is some cases impossible to find a definite value. c.It is not based on all observation. So i
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
A paper mill produces two grades of paper viz., X & Y. Because of raw material restrictions, it cannot produce more 400 tons of grade X paper & 300 tons of grade Y paper in a week.
RANGE Range is the difference between the highest and the lowest value is series. This is the simplest absolute measure of dispersion. Symbolically : R= L- S
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