diff --git a/app/policies/exercise_policy.rb b/app/policies/exercise_policy.rb
index 500930c6..ba30802d 100644
--- a/app/policies/exercise_policy.rb
+++ b/app/policies/exercise_policy.rb
@@ -3,11 +3,11 @@ class ExercisePolicy < AdminOrAuthorPolicy
     admin?
   end
 
-  [:show?, :study_group_dashboard?, :feedback?, :requests_for_comments?].each do |action|
+  [:show?, :study_group_dashboard?, :feedback?, :requests_for_comments?, :statistics?].each do |action|
     define_method(action) { admin? || teacher? }
   end
 
-  [:clone?, :destroy?, :edit?, :statistics?, :update?].each do |action|
+  [:clone?, :destroy?, :edit?, :update?].each do |action|
     define_method(action) { admin? || author? }
   end
 
diff --git a/app/views/exercises/statistics.html.slim b/app/views/exercises/statistics.html.slim
index dfa79b25..ec47d3df 100644
--- a/app/views/exercises/statistics.html.slim
+++ b/app/views/exercises/statistics.html.slim
@@ -24,7 +24,7 @@ h1 = @exercise
 = row(label: '.average_worktime') do
   p = @exercise.average_working_time
 
-- Hash[:internal_users => t('.internal_users'), :external_users => t('.external_users')].each_pair do |symbol, label|
+- Hash[:internal_users => t('.internal_users'), :external_users => t('.external_users')].each_pair if current_user.admin? do |symbol, label|
   strong = label
   -if symbol==:external_users
     -working_time_array = []