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NORMAL DISTRIBUTION
Normal (Gaussian) distribution is the most famous probability
distribution of continuous variables.
The two parameters of the normal distribution are the mean (μ)
and the standard deviation (σ).
The graph has a familiar bell-shaped curve.
The function of normal distribution curve is as follows:
1
f ( x) 
e
 2
1  xi   
 

2  
2
   xi  
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