exculde low scores from mean

generic/views.py

@@ -2129,7 +2129,10 @@ class ExamViews(View, LoginRequiredMixin):
             mode = 0
             fig_html = ""
         else:
-            mean = statistics.mean(user_scores_list)
+            #Exclude very low scores from statistics
+            lower_score_bound = max_score / 5
+
+            mean = statistics.mean([i for i in user_scores_list if i > lower_score_bound])
             median = statistics.median(user_scores_list)
             try:
                 mode = statistics.mode(user_scores_list)