Question

can mean of a data be negative

Answer 1

Negative numbers arise where there is a natural 'direction'. For example profit and loss, and problems involving change (increase or decrease). In these cases the observations can have either sign, and so can the mean. ... So in that case, it is obvious that the mean is positive......

Answer 2

yes. here is a example
-2,-3,-4
mean=-2+(-3)+(-4)/3
-9/3
-3 pt
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