(*Object Model Statistics - first draft *)

(* This file defines the objects and operations of a Statistic *)

object Statistics
    components: GradedItem* and Class and Average and Median and
                StdDev and Range;
    description: (*
        Statistics consists of any number of graded items and a class. 
        Average, median, stdDev and range tell whether or not include
        that statistic
    *);
end Statistics;

object Average is 
    components: avg and show and GradedItem*;
    description: (*
         avg is the average of the GradedItems its given and show is a boolean
         that tells whether or not the show this stat in statistics.
    *);
end Average;

object avg is integer;

object show is boolean;

object Median is 
    components: median and show and GradedItem*;
    description: (*
         median is the median of the GradedItems its given and show is a boolean
         that tells whether or not the show this stat in statistics.
    *);
end Median;

object median is integer;

object StdDev is 
    components: StdDev and show and GradedItem*;
    description: (*
         stdDev is the standard deviation of the GradedItems its given and show is a boolean
         that tells whether or not the show this stat in statistics.
    *);
end StdDev;

object Range is 
    components: beginR and endR and show and GradedItem*;
    description: (*
         beginR is the smallest number is the range and endR is the end of the 
         range of the GradedItems its given and show is a boolean
         that tells whether or not the show this stat in statistics.
    *);
end Range;

object beginR is integer;
object endR is integer;

operation ViewStatisticsInWindow is 
    inputs: GradedItem*, Class, Average, Median, StdDev, Range;
    outputs: ;
    description: (*
          ViewStatisticsInWindow displays a statistics object in a new window
    *);
end ViewStatisticsInWindow;

operation ViewStatisticsInGradebook is 
    inputs: GradedItem*, UserWorkSpace, Class, Average, Median, StdDev, Range;
    outputs: UserWorkSpace;
    description: (*
          ViewStatisticsInGradebook displays the statistics in rows in the
          gradebook
    *);
end ViewStatisticsInWindow;