Statistics

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`np.mean(arr,axis=0)`	Returns mean along specific axis
`arr.sum()`	Returns sum of arr
`arr.min()`	Returns minimum value of arr
`arr.max(axis=0)`	Returns maximum value of specific axis
`np.var(arr)`	Returns the variance of array
`np.std(arr,axis=1)`	Returns the standard deviation of specific axis
`arr.corrcoef()`	Returns correlation coefficient of array

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