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# Statistics 1 - Method Question Watch

1. There are a lot of questions that start off worded, like 'The probability of ___ is ___', etc. Some of these questions can use tree diagrams and other can use ven diagrams. I've got a bit confused knowing when to use what diagram to help me.

Out of interest, is there a rule that will help me to know whether to use a ven diagram or a tree diagram? Like the ones that use a ven diagram seem to be slightly different questions, is there something I should look out for to tell me it's one type instead of the other?

Thanks again.
2. You may often find questions that can be answered both ways. I suppose if the events referred to in the question are in some way sequential (e.g a team winning or losing two matches or a person maybe having a disease then getting tested for that disease) then a tree diagram would be more appropriate. An example of when a venn diagram would be better would be if you were taking a card and you were looking at whether the card was a spade and whether the card was an ace. But you could still use a tree diagram for this - it depends what you find easier.
3. (Original post by ttoby)
You may often find questions that can be answered both ways. I suppose if the events referred to in the question are in some way sequential (e.g a team winning or losing two matches or a person maybe having a disease then getting tested for that disease) then a tree diagram would be more appropriate. An example of when a venn diagram would be better would be if you were taking a card and you were looking at whether the card was a spade and whether the card was an ace. But you could still use a tree diagram for this - it depends what you find easier.
This. Depends which you find easier, but sometimes the question paper often specifies which one you have to use. I.e. "Draw a tree diagram representing this information".

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