Posted on:

13 Oct 2023


And I still have concerns about section 8 practice exam question #3

I cannot make clear about the mean that you are asking for the second column:

There is no way that for 2nd column to come up with a mean value of's plausible if it was referring to the 3rd (after removing NAN column one) or 4th column (if nan column one is not removed).

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