It is important to remember that there is no formal definition of an outlier. An outlier is an observation (or a small number of observations) which is (area) out of line with the rest of the observations.
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You cannot. If you are told the standard deviation of a variable there is no way to tell whether that was derived from grouped or ungrouped data.
You could tell whether or not the data were skewed but that is all. You could make no assessment about the central tendency (mean) or spread (range, inter-quartile range).
the midpoint of the data set
I think it means that our data includes outliers.
tell whether the measure could represent the perimeter or the area of a figure