diff --git a/lib/event.rb b/lib/event.rb
new file mode 100644
index 0000000..1fa0f59
--- /dev/null
+++ b/lib/event.rb
@@ -0,0 +1,75 @@
+class Event
+
+  attr_reader :name, :ages
+  def initialize(event_name, ages_for_event)
+    @name = event_name
+    @ages = ages_for_event
+  end
+
+  def max_age
+    max_age_holder = 0
+    @ages.each do |age|
+
+      if age > max_age_holder
+        max_age_holder = age
+      end
+
+    end
+    max_age_holder
+  end
+
+  def min_age
+    min_age_holder = 99999999
+
+    @ages.each do |age|
+
+      if age < min_age_holder
+        min_age_holder = age
+      end
+
+    end
+
+    min_age_holder
+  end
+
+  def average_age
+    average_age_holder = 0.0
+
+    @ages.each do |age|
+      average_age_holder += age
+    end
+
+    value = average_age_holder / @ages.size
+    value.round(2)
+  end
+
+  def standard_deviation_age
+    step1_value = 0.0
+    divide_value = @ages.size
+    @ages.each do |value|
+      step1_value += value
+    end
+    step3_value = 0.0
+    step3_value = step1_value / divide_value
+
+    step4_array = []
+    @ages.each do |value|
+      step4_array << (value - step3_value)
+    end
+
+    step5_array = []
+    step4_array.each do |value|
+      step5_array << (value * value)
+    end
+
+    step6_sum = 0
+    step5_array.each do |value|
+      step6_sum += value
+    end
+    step7_divide = step6_sum / divide_value
+
+    total = Math.sqrt(step7_divide)
+    total.round(2)
+  end
+
+end
diff --git a/lib/games_runner.rb b/lib/games_runner.rb
new file mode 100644
index 0000000..882f05d
--- /dev/null
+++ b/lib/games_runner.rb
@@ -0,0 +1,30 @@
+require './lib/event'
+require './lib/games'
+
+puts "What year is it?"
+year = gets.chomp
+game = Games.new(year)
+puts "Type in the name of the event and then the ages of the players."
+puts "Type quit to see a summary"
+input = ''
+puts "What is the name of the event? Type quit here to see the summary"
+input = gets.chomp
+while input != "quit" do
+  ages_array = []
+  puts "Type in the age of one player. Type in quit to create a different event"
+  age_input = ''
+  if input != 'quit'
+    while age_input != 'quit' do
+      puts "Age of a player: "
+      age_input = gets.chomp
+      if age_input != 'quit'
+        ages_array << age_input.to_i
+      end # age_input != 'quit'
+    end # age_input != 'quit' do
+  end # input != 'quit'
+  event = Event.new(input, ages_array)
+  game.add_event(event)
+  puts "What is the name of the next event? Type quit here to see the summary"
+  input = gets.chomp
+end #while input != "quit" do
+puts game.summary
diff --git a/lib/standard_deviation.rb b/lib/standard_deviation.rb
index e17b03a..2a02aa6 100644
--- a/lib/standard_deviation.rb
+++ b/lib/standard_deviation.rb
@@ -1,5 +1,33 @@
 ages = [24, 30, 18, 20, 41]
 
 # Your code here for calculating the standard deviation
+def standard_deviation(dev_array)
 
+  step1_value = 0.0
+  dev_array.each do |value|
+    step1_value += value
+  end
+  step3_value = 0.0
+  step3_value = step1_value / dev_array.size
+
+  step4_array = []
+  dev_array.each do |value|
+    step4_array << (value - step3_value)
+  end
+
+  step5_array = []
+  step4_array.each do |value|
+    step5_array << (value * value)
+  end
+
+  step6_sum = 0
+  step5_array.each do |value|
+    step6_sum += value
+  end
+  step7_divide = step6_sum / dev_array.size
+
+  total = Math.sqrt(step7_divide)
+  puts total
+end
 # When you find the standard deviation, print it out
+standard_deviation(ages)
diff --git a/test/event_test.rb b/test/event_test.rb
new file mode 100644
index 0000000..e424a37
--- /dev/null
+++ b/test/event_test.rb
@@ -0,0 +1,41 @@
+require 'minitest/autorun'
+require 'minitest/pride'
+require './lib/event'
+
+class EventTest < Minitest::Test
+
+  def test_if_event_exist
+    event = Event.new("Curling", [24, 30, 18, 20, 41])
+    assert_instance_of Event, event
+  end
+
+  def test_if_event_has_name
+    event = Event.new("Curling", [24, 30, 18, 20, 41])
+    assert_equal "Curling", event.name
+  end
+
+  def test_if_event_has_ages
+    event = Event.new("Curling", [24, 30, 18, 20, 41])
+    assert_equal [24, 30, 18, 20, 41], event.ages
+  end
+
+  def test_event_max_age
+    event = Event.new("Curling", [24, 30, 18, 20, 41])
+    assert_equal 41, event.max_age
+  end
+
+  def test_event_min_age
+    event = Event.new("Curling", [24, 30, 18, 20, 41])
+    assert_equal 18, event.min_age
+  end
+
+  def test_event_average_age
+    event = Event.new("Curling", [24, 30, 18, 20, 41])
+    assert_equal 26.6, event.average_age
+  end
+
+  def test_event_standard_deviation
+    event = Event.new("Curling", [24, 30, 18, 20, 41])
+    assert_equal 8.28, event.standard_deviation_age
+  end
+end