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Statistical inference
This is the process of drawing conclusions about attributes of a population based upon information contained in a sample or taken from the population.
This is divided into estimation of parameters and testing of hypothesis. Symbols for statistic of population parameters are as given below:
Sample Statistic
Population Parameter
Arithmetic mean
x¯
µ
Standard deviation
s
σ
Number of items
n
N
#question.x2-y2-4x-2y+3.
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