grouping.var: The grouping variables. Default NULL generates one word list for all text. Also takes a single grouping variable or a list of 1 or more grouping variables.
original_order: logical. IF TRUE orders by the original order. If FALSE orders by group.
digits: Integer; number of decimal places to round.
Returns
Returns a list of two: - SCALED_OBSERVATIONS: A dataframe of scaled observations at level one and two of the nesting with possible outliers.
DESCRIPTIVES_BY_GROUP: A data frame of descriptives by group.