That's not the correct definition of the concept of "weighted average". Instead, it's rather the average product of two data vectors x and w.
I agree with yurenchu. If you want to choose Problems to translate, then first read all comments made about the original Problem statement to see if there are any important critiques to heed. If so, then either address the critiques and create an improved version of the Problem, or else choose a different original Problem.
Changed the translation
Very good :-)
Back to basics 14 - Keywords
Remove the two elements next to NaN value
Is it a number?
Find the index of the largest value in any vector X=[4,3,4,5,9,12,0,4.....5]
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