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01 Apr 2020, 06:57
Kudos
Bookmarks
Hi,
I am slightly confused about when to Venn Diagrams and when to use contingency tables. I saw a couple of solutions in OG which use both for solving. Could you help me understand this?
I am slightly confused about when to Venn Diagrams and when to use contingency tables. I saw a couple of solutions in OG which use both for solving. Could you help me understand this?
07 Apr 2020, 04:25
Kudos
Bookmarks
Shekhar89
Hi,
I am slightly confused about when to Venn Diagrams and when to use contingency tables. I saw a couple of solutions in OG which use both for solving. Could you help me understand this?
I am slightly confused about when to Venn Diagrams and when to use contingency tables. I saw a couple of solutions in OG which use both for solving. Could you help me understand this?
Hello Shekhar,
As explained in our course videos, we draw Venn diagrams when there’s something in common between two or more sets of data. When there is nothing in common, we draw a 2 by 2 grid.
What’s the easiest way to figure out? Well, I wish I could say that there is a magic sauce which will help you categorise questions neatly into Venn diagrams and tables, but sadly, there isn’t. We will have to depend on ourselves (which is good BTW).
Clearly, language is the biggest give away. Also, you need to put yourselves into the situation defined in the problem.
In a given situation, can I be in more than one places at the same time (well not literally, unless you are a superhero)?? If your answer is yes, then a Venn diagram has to be drawn.
For example, can you be in the Cricket club as well as the Badminton club of your school? Heck, why not!
On the other hand, if your answer is No, then a table has to be drawn.
In questions where you need to draw a table, the biggest give away, MOST OFTEN, is the mentioning of males & females/men& women/boys&girls. You can surely not be in both groups. Note that I said MOST OFTEN and not always. There can be Venn diagram questions where there are boys and girls.
For example, can you be at least 40 years old and less than 40 years old at the same time? Aww, we wish we could, but that’s impossible.
Lastly, know that there are questions where both a Venn diagram and a table can be drawn. In such cases, it’s purely a matter of preference and convenience. The idea is to not get too many sources of information cloud your judgement. Stick to one, chart your own path.
Hope that helps!
