Hey Developer’s, I’m back with a new topic which is Independence Of Events in the series of statistics foundations.

Quick Referesher

Set Operations On Events – Statistics Part 5

So, let’s get started …

Independence & Dependence Events

If events do not influence one another, they are called independent.

Example:

  • Successive die rolls or coin flips
  • Owning a dog and growing your own herb garden.
  • Paying off your mortgage early and owning a Chevy Cavalier.
  • Winning the lottery and running out of milk.
  • Buying a lottery ticket and finding a penny on the floor (your odds of finding a penny does not depend on you buying a lottery ticket).
  • Taking a cab home and finding your favourite movie on cable.
  • Getting a parking ticket and playing craps at the casino.

If subsequent events influence one another, they are dependent

Example:

  • Coloured balls being pulled out of a hat without replacement. The set of possible balls gets reduced as you pull them out so probability changes.
  • Robbing a bank and going to jail.
  • Not paying your power bill on time and having your power cut off.
  • Boarding a plane first and finding a good seat.
  • Parking illegally and getting a parking ticket. Parking illegally increases your odds of getting a ticket.
  • Buying ten lottery tickets and winning the lottery. The more tickets you buy, the greater your odds of winning.
  • Driving a car and getting in a traffic accident.

Next Post will be on Introduction to Probability and Examples

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