Presentation is loading. Please wait.

Presentation is loading. Please wait.

The Monty Hall Problem Probability and Statistics Probability Theory.

Similar presentations


Presentation on theme: "The Monty Hall Problem Probability and Statistics Probability Theory."— Presentation transcript:

1 The Monty Hall Problem Probability and Statistics Probability Theory

2 History September 1991, a reader of Parade asked a question to the Ask Marilyn column If youre on a game show and you can choose one of three doors where theres a car behind one and a goat behind the other two, after picking a door, would you switch doors after being revealed one with a goat? Is there an advantage? Marilyn Vos Savant responded saying it would be better to switch, and there was a lot of controversy with this response Matthew Carlton, Cecil Adams, and Keith Devlin later gave their reasoning that aligned with Marilyns

3 History contd This dilemma was named after Monty Hall Monty Hall was the host of Lets Make a Deal in the 1960s and 1970s 3 doors are shown and the contestant picks one One door has a car, the other two have nothing A door that wasnt picked is opened to reveal its empty The contestant has a choice to stick with their door or change to the other one

4 The big question…. Should you switch???

5 Explanation The choice isnt luck but based on probability 1/3 chance of picking the car at the beginning Once a door is eliminated, the chance of winning a car between the last 2 doors is NOT 50-50 Need to look at 2 options: Always switching Always staying

6 Explanation Contd Always stay: 2/3 chance of picking a door with nothing 1/3 chance of picking the door with the car Always switch: 2/3 chance of picking a door with the car 1/3 chance of picking a door with nothing

7

8 There is a 2/3 chance of getting the car if you switch. This means you have a better chance at winning if you switch!

9 References http://math.ucsd.edu/~crypto/Monty/montybg.html https://www.khanacademy.org/math/trigonometry/prob_c omb/dependent_events_precalc/v/monty-hall-problem http://en.wikipedia.org/wiki/Monty_Hall_problem#Solution s


Download ppt "The Monty Hall Problem Probability and Statistics Probability Theory."

Similar presentations


Ads by Google