Add number of users and relative scores to execution environment statistics

app/views/execution_environments/statistics.html.slim

@@ -4,12 +4,16 @@ h1 = @execution_environment
   table.table
     thead
       tr
-        - ['.exercise', '.score', '.runs', '.worktime'].each do |title|
+        - ['.exercise', '.users', '.score', '.maximum_score', '.percentage_correct', '.runs', '.worktime'].each do |title|
           th.header = t(title)
     tbody
       - @execution_environment.exercises.each do |exercise|
+        - average_score = exercise.average_score
         tr
           td = link_to exercise.title, controller: "exercises", action: "statistics", id: exercise.id
-          td = exercise.average_score
+          td = exercise.users.distinct.count
+          td = average_score
+          td = exercise.maximum_score
+          td = 100 / exercise.maximum_score * average_score
           td = exercise.average_number_of_submissions
           td = exercise.average_working_time

config/locales/de.yml

@@ -169,7 +169,10 @@ de:
       headline: Shell
     statistics:
       exercise: Übung
+      users: Anzahl (externer) Nutzer
       score: Durchschnittliche Punktzahl
+      maximum_score: Maximale Punktzahl
+      percentage_correct: Prozent Korrekt
       runs: Durchschnittliche Anzahl von Versuchen
       worktime: Durchschnittliche Arbeitszeit
   exercises:

config/locales/en.yml

@@ -169,7 +169,10 @@ en:
       headline: Shell
     statistics:
       exercise: Exercise
+      users: (External) Users Count
       score: Average Score
+      maximum_score: Maximum Score
+      percentage_correct: Percentage Correct
       runs: Average Number of Runs
       worktime: Average Working Time
   exercises: