Averages/Arithmetic mean: Difference between revisions

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 {{task}}
-Write a program to find the mean (arithmetic average) of a numeric vector.
+Write a program to find the mean (arithmetic average) of a numeric vector. The program should work on a zero-length vector (with an answer of 0).
-The program should work on a zero-length vector (with an answer of 0).
 =={{header|J}}==
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  mean=: +/ % #
-That is, sum divided by the number of items.  The verb also works on higher-ranked arrays.  For example:
+That is, sum divided by the number of items. The verb also works on higher-ranked arrays. For example:
     mean 3 1 4 1 5 9
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 .58243 0.402948 0.477066 0.511155
-The computation can also be written as a loop.  It is shown here for comparison only and
+The computation can also be written as a loop. It is shown here for comparison only and is highly non-preferred compared to the version above.
-is highly non-preferred compared to the version above.
  mean1=: 3 : 0