Conditional Probability and Tree Diagrams

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  • Опубліковано 23 гру 2024

КОМЕНТАРІ • 7

  • @amelyabuckley3027
    @amelyabuckley3027 4 місяці тому +1

    You have saved me, thankyou so much. You have made it so easy to understand!

  • @elliotarundella7581
    @elliotarundella7581 8 місяців тому +1

    Thank you

    • @elliotarundella7581
      @elliotarundella7581 8 місяців тому +1

      I'm a bit slow at maths, would you mind explaining why the formula is structured that way?

    • @nhamiltondwight
      @nhamiltondwight  8 місяців тому

      You're welcome... I'll try to give you a short and simple answer here, but not sure if it's sufficient. :)
      If you have a conditional probability question, the denominator is the given condition, since we know that that thing has occurred (so it's essentially the new total)... And the numerator is the the event, specifically within the given condition.

  • @David-ow7nt
    @David-ow7nt 5 місяців тому

    i think you should multiply the 0.2 * 0.6 … you know that it has rained doesn’t mean that P(rain) = 1

    • @nhamiltondwight
      @nhamiltondwight  5 місяців тому +1

      Hi... This is one of the trickiest (not hardest, but trickiest) topics of probability because of the tiny subtleties. There is a difference between asking about it raining and you walked (in which case, yes, you do multiply) or asking what the probability is that you walked if you know that it rained. If something is a certainty, then by default, then by definition, the probability is in fact 1. Hope that helps!